You need to have Finding NEMO and it is in chapter 25--Darla! (1:18:16) (I attached the waterfall chart to this too)

I just thought it might be something fun for ALL SUBWOOFER users to take part in....just something friendly :D

I wondered if people could take out their SPL meter and play the Darla taps the Tank scene. It has Very strong bass centered around 30hz and for the most part doesn't have too much above or below that point....

Some things I learned to be sure of when using the SPL meter.
1. Use C-weighting FAST for this peak test
2. Use the MAX button if you have a digital Meter

I'm curious about a few things.
1. db registered using C-rating Fast and MAX (if avalible) on the Radio Shack SPL Meter from Listening Position...Just post uncorrected numbers...meaning, post exactly what your SPL meter shows....
2. db from 1 meter away (this should help get an accurate reading for everyone since LP varies)
3. Room size cubic feet
4. What subwoofer set up are you running?
5. What setting of Master Volume and what do you have your sub dialed in at?
****Note....when running this test turn off main speakers if possible so you are just measuring the subwoofer output :D


I'll start since I just watched it again and it gave me this idea :)

MASTER DATA LIST for DARLA SCENE---Updated 3/2/07 at 7:44am

Bgillyjcu
Run#1
1. 101db from Listening Position (Digital SPL Meter--Max)
2. 109db from 1 meter (Digital SPL Meter--Max)
3. 2300cuft (not sealed due to open doorway)
4. A single SVS 16-46Plus
5. Master Volume -10db Sub calibrated to 72db on SPL meter (uncorrected)

1. 103db from Listening Position (Digital SPL Meter--Max)
2. 111db from 1 meter (Digital SPL Meter--Max)
3. 2300cuft (not sealed due to open doorway)
4. A single SVS 16-46Plus
5. Master Volume -8db Sub calibrated to 72db on SPL meter (uncorrected)

1. 104db from Listening Position (Digital SPL Meter--Max)
2. 113db from 1 meter (Digital SPL Meter--Max)
3. 2300cuft (not sealed due to open doorway)
4. A single SVS 16-46Plus
5. Master Volume -6db Sub calibrated to 72db on SPL meter (uncorrected)

1. 107db from Listening Position (Digital SPL Meter--Max)
2. 115db from 1 meter (Digital SPL Meter--Max)
3. 2300cuft (not sealed due to open doorway)
4. A single SVS 16-46Plus
5. Master Volume -4db Sub calibrated to 72db on SPL meter (uncorrected)

1. 107db from Listening Position (Digital SPL Meter--Max)
2. 116db from 1 meter (Digital SPL Meter--Max)
3. 2300cuft (not sealed due to open doorway)
4. A single SVS 16-46Plus
5. Master Volume -3db Sub calibrated to 72db on SPL meter (uncorrected)


Thumpin Sub (from sound and vision forum)
Results #1
1. 93 dB from Listening Position
2. 103 dB from 1 meter
3. 1560 with 2 fixed-openings into other rooms
4. SVS PB12-NSD/2
5. -10 dB (normal listening level) Sub calibrated to 70dB

Results #2
1. 101 dB from Listening Position
2. 109 dB from 1 meter
3. 1560 with 2 fixed-openings into other rooms
4. SVS PB12-NSD/2
5. -4 dB (to compare with you) Sub calibrated to 70dB

DrPainMD
1. 96db from Listening Position
2. 105db from 1 meter
3. 1310cuft (sealed)
4. SVS 25-31PCi (tuned to 22hz)
5. Master Volume -25db(my 75db reference is -15db using avr pink noise) Sub is calibrated to 75db on SPL meter (uncorrected) (-10db under reference)

1. 98db from Listening Position
2. 108db from 1 meter
3. 1310cuft (sealed)
4. SVS 25-31PCi (tuned to 22hz)
5. Master Volume -22db(my 75db reference is -15db using avr pink noise) Sub is calibrated to 75db on SPL meter (uncorrected) (-7db under reference)

1. 101db from Listening Position
2. 110db from 1 meter
3. 1310cuft (sealed)
4. SVS 25-31PCi (tuned to 22hz)
5. Master Volume -19db(my 75db reference is -15db using avr pink noise) ,Sub is calibrated to 75db on SPL meter (uncorrected) (-4db under reference)

cyberbri
1. 105.5dB on digital meter
2. haven't measured at 1m
3. 2800cf, open in rear
4. Hsu VTF-3 Mk2, Max Extension mode (1 port plugged), eq'd flat
5. -10 MV, sub calibrated 2~3dB flat

1. 107dB on digital meter
2. haven't measured at 1m
3. 2800cf, open in rear
4. Hsu VTF-3 Mk2, Max Extension mode (1 port plugged), eq'd flat
5. -7 MV, sub calibrated 2~3dB flat

Frockc
1. 106dB on very old digital meter 11-12ft away...
2. 115dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -15 MV, sub calibrated 75dB flat with speakers at 0 MV

1. 108dB on very old digital meter 11-12ft away...
2. 119dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -10 MV, sub calibrated 75dB flat with speakers

1. 110dB on very old digital meter 11-12ft away...
2. 119dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -5 MV, sub calibrated 75dB flat with speakers

kweezr
1. 108 at Listening Position
2. 115 at 1 meter
3. 6800cf great room with 14ft vaulted ceiling
4. SVS PB-Ultra/2, ss 20Hz
5. -5 MV, 4db hot, nearfield

vishal
1. 113 dB (13 feet away) at listening position
2. 121 dB (1 meter)
3. 2400 ft^3 living room, right wall completely open to 1500 ft^3 dining room/kitchen
4. Single JL Audio Fathom F113
5. 0 MV, sub calibrated flat to 85db with Avia

longfellowfan
1. 106 db using newest radio shack analog (fast on both)
2. 108 db from 1 meter
3. 1408 Cubic Feet. One open doorway and one 5.5'x3.5' opening
4. SVS PB-10-ISD
5. Master Volume -7db Sub Cal at 75db flat. No running hot for the test.

pdadi
1. 102 db using newest radio shack analog (fast on both)
2. 104 db from 1 meter
3. 2000 Cubic Feet. One open doorway and one 5.5'x3.5' opening and another one to stairs
4. Bic H-100
5. Master Volume -5 Sub Cal at 77db flat. 2 db hotter than speakers.

dirtraven1
1. 107 db at regular viewing spot with radio shack digital (fast on C)
2. 111 db from 1 meter
3. 3300 Cubic Feet. AV setup with on 10 foot wall and rest opens into dining area/stairway and on through to kitchen.
4. Old PB12 box with new NSD driver, so it's downfiring.
5. Master Volume -34 Sub Cal at 75db flat.

Flatsix
1 107 DB
2 120 db
3 2400 cuf
4 HSU 3.3 with one port open (max extension)----(no Turbo)
5 calibrated at 75 db

movies2090
1. 99db from listening postion
2. xxx-didn't try
3. 3000cu ft
4. a PB12-Plus colocated w/ PB12-ISD
5. Master Volume -12db Sub calibrated to 78db on SPL meter (+3db hot)

MKtheater
1. 110 db from Listening Position (analog SPL Meter-fast)
2. 115 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 16 hz tune
5. Master Volume -10db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

1. 111 db from Listening Position (analog SPL Meter-fast)
2. 116 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 16 hz tune
5. Master Volume -5 db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

1. 111 db from Listening Position (analog SPL Meter-fast)
2. 117 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 16 hz tune
5. Master Volume 0 db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

Here are the new numbers with 25 hz tune
1. 111 db from Listening Position (analog SPL Meter-fast)
2. 118 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 25 hz tune
5. Master Volume -10db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

1. 114 db from Listening Position (analog SPL Meter-fast)
2. 120 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 25 hz tune
5. Master Volume -5 db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

1. 116 db from Listening Position (analog SPL Meter-fast)
2. 122 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 25 hz tune
5. Master Volume 0 db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

Mojomike
1. 115 db in Listening area, about 14 ft.
2. 126 db 1 meter from ported sub, Behringer lighting up like a Christmas tree
3. 6120 cu ft. open room.
4. Two SB12Plus's and a 2 x 10" TC1000 6.5 cu ft. ported box
5. No volume settings listed

GOV
1. 111db from listening position (about 15 feet away)
2. not tested
3. 2000 cu ft open to kitchen
4. Mirage S12
5. -2dbMV MCACC calibrated just the sub on other speakers off

KingRSL
1. 100dB on analog meter
2. haven't measured at 1m
3. 2750cf, open to hallway
4. Hsu VTF-2 Mk3, Max Extension mode (1 port plugged)
5. "0" MV, sub calibrated +3dB

dmccombs
1) 104 Ddb at litening position (~12 feet from sub).
2) 113db at 1 meter from sub (RS Analog meter (uncorrected), only sub on).
3) 3360 cubic feet (opening to dining room and 2 doors)
4) SVS 20-39pci (EQ with Denon AVR - Audessey)
5) 0MV

kgb540
1.) 109db approx. 12 feet
2.) 115db 1 meter
3.) 2800 cuft room open to hallway on one end and kitchen on the otherside
4.) Single JL Audio Fathom F112
5.) ARO corrected, sub level calibrated at 75db


Patdeisa
1. 105db from Listening Position (Digital SPL Meter--Max)
2. 117db from 1 meter (Digital SPL Meter--Max)
3. 2000 ft^3 (not sealed-open to rest of downstairs townhouse {4000ft^3})
4. A single PB10-ISD
5. Master Volume -0db, Sub Volume -6db, Sub calibrated to 85db on SPL meter (uncorrected)

Gordon1080P
1. 110dB @ LP
2. n/a
3. 4,800 ft3
4. HSU VTF3 MK3, no turbo, 18Hz tuning
5. Master volume @ -7dB

Yes,good idea. I would have to dig out my old analog Rat Shack SPL meter,the scene you refer to was optimised to make pretty much any sub sound mighty.

I have recorded over 120dB at listening position,very easy to reach around 30Hz in a small room and in a mid sized one woth an army of subs. I wonder how two f113s and an f112 will do in a 800cu ft room. ;) With the help of five Klipsch subs(RSWs,RTs).

I'm not sure if you have seen this thread before. Its a couple years old. Check it out :)
http://archive2.avsforum.com/avs-vb/showthread.php?t=600760&highlight=darla

I'm not sure if you have seen this thread before. Its a couple years old. Check it out :)
http://archive2.avsforum.com/avs-vb/showthread.php?t=600760&highlight=darla

WOW cool....never knew anyone did this.

Well lets do a current one here:)

My 105 seems WUSSY compared to some of those numbers....

That original poster says he hit 117db with Dual SVS CS 20-39s DAMN :eek:

I don't have an SPL meter. :(

i've heard about this countless times, but have yet to experience it. can anybody list the time-stamp of this scene? maybe i'll rent it and give it a shot with a single PB-10 ISD.

i've heard about this countless times, but have yet to experience it. can anybody list the time-stamp of this scene? maybe i'll rent it and give it a shot with a single PB-10 ISD.

Play it from scene 24. You'll know when the scene starts. LOL :eek: :D

thx guys...i'll try and give it a shot in the near future.

These numbers will be different, many people run their subs hot, really hot. I myself hit 115 db's in the front center seat and 118-119 db's from the back center seat. I have a 2300 cubic foot room(sealed) and my PB12/plus/2 in 16 hz tune and it sits right behind the second row. I listened at reference level (0 db's) with my sub set at 75 db's. I can get well over 120 db's in the second row with it set at 25 hz and running the sub hot. I like reference levels so going over 115 db's does not matter that much to me. My goal is to reach 115 db's at the front center which I acheive now. This week I will be getting some horn loaded 18 inch subs. I am sure I will be getting some big numbers. I will post them as well.

I've played this scene a few times to compare sub SQ. Some do it better than others and it's a cute scene. If you want to see how loud your sub will go, great, but anything over 100dbs is probably louder than most listen to movies in their home. I'm not sure I see the point ... :confused:

5. Master Volume -4db Sub is calibated to 72db on SPL meter (uncorrected)


How are you calibrating? Is that 72dB (uncor) for the sub and 75dB for the speakers, so about even with the speakers (assuming you're using an analog meter)?


Also, are you using the max/peak hold on Fast for your readout of the max SPL in the scene?

Just tried this for kicks.

Sub: Hsu VTF-3 Mk2, calibrated 2dB hot above speakers, eq'd flat (see my signature), placed near front right corner of room, listening position 10' from the sub
Room is about 2800sf, opening in rear left corner (opposite corner from sub)

At the listening position
At -10, I got 105.5dB uncorrected (106dB when digital meter set to 100, 105 when set to 110)

At -7, I got 107dB uncorrected (meter set to 110)


I normally watch movies at about -10, sometimes a little higher. We actually watched this movie a few weekends ago, at about -8. But I have side-wall treatments so it doesn't seem as "loud" in the higher frequencies in my room as other rooms might.

i've heard about this countless times, but have yet to experience it. can anybody list the time-stamp of this scene? maybe i'll rent it and give it a shot with a single PB-10 ISD.

Yep, scene 24 and it has Darla in the description. The tapping is gong when the scene starts, so WATCH OUT! When I play it for friends, I always turn it down and start the scene. Then I track back a bit to the pelican flying and turn it up before it starts again. This keeps the underwear changing down to a minimum. If you have your sub up full when you go directly to the scene it will knock the wax out of your ears and errrrr...junk out of your butt....especially if you have a capable sub.

I'll do some measurments when I can get my new reciever set up.

How are you calibrating? Is that 72dB (uncor) for the sub and 75dB for the speakers, so about even with the speakers (assuming you're using an analog meter)?


Also, are you using the max/peak hold on Fast for your readout of the max SPL in the scene?


Using a Digital SPL meter....72db Uncorrected.

C-weighing FAST looking for the MAX.

it would be easier to read if you could post in this format....

1. 105db from Listening Position (Digital SPL Meter)
2. 113db from 1 meter
3. 2300cuft (not sealed due to open doorway)
4. A single SVS 16-46Plus
5. Master Volume -4db Sub is calibated to 72db on SPL meter (uncorrected)


The 1 meter number is important since it can be a set measurement.........the LP measurements will be relative since everyones is diffterent...

Is everyone sure it's chapter 24? My DVD says it's chapter 25 , Darla! (1:18:16 is tapping)

Is everyone sure it's chapter 24? My DVD says it's chapter 25 , Darla! (1:18:16)

it's chapter 25

Is everyone sure it's chapter 24? My DVD says it's chapter 25 , Darla! (1:18:16)

That's why I stated, "Play it from scene 24. You'll know when the scene starts."

It's hard to calibrate or measure anything if you start right at the begining of that scene. ;)

That's why I stated, "Play it from scene 24. You'll know when the scene starts."

It's hard to calibrate or measure anything if you start right at the begining of that scene. ;)

Ok, sure. I just wanted to know for the purpose of my list. (see sig)

Ok, sure. I just wanted to know for the purpose of my list. (see sig)
Personally I start it from chapter 25 , Darla! (1:18:16) too

With the meter on fast you can get an accurate reading since the TAPPING happens several times over about a 10-12second span...

ps.....I did mine on SLOW....ED Mullen suggested that SLOW be used for calibration and FAST for measuring those Peaks..

Now I didn't know that, so I learned something.....Now I'll have to remeasure tonight when I get home...he said I should see 1-2-3db increase using fast :D

I also asked him about the Digital Radio Shack Meter....is it more accurate.....do we need to apply correction numbers to it??

For the PURPOSE of this thread DO NOT APPLY CORRECTION to your numbers....just post them as you see them on your SPL...maybe even note ANALOG or DIGITAL...

Interesting. Now that I think about it, I've never measured max SPL - I've only used my meter to check for FR.

Decided to give it a try, but knew it wouldn't be impressive. My listening room is fair sized, with a cathedral ceiling, opens to another room on one side, and is completely open on the "back wall".

That being said - "YOU GUYS ARE CRAZY!!". :D (I mean that in the nicest way! :D )

I turned my master to -6 (about 3 to 6 higher than I usually listen) and got peaks of 95-96 at my listening position. Even at this volume, my HVAC ducts sounded like they were going to come through the wall. I decided not to check any further - don't want to have to repair anything. You must have removed anything that rattles or can move from your room.

I'm pretty sure that if I had anything even remotely close to a closed room, I'd get better numbers, but it is what it is.

Be kind to your ear drums - they're the only ones you've got. ;)

I will redo tonight with my analogue meter set to fast as well.

I'm not trying to be a pain But I want to create a Master list of our data.

Can we please put our information in this format??

1. db registered using C-rating Fast on the Radio Shack SPL Meter from Listening Position--Just post uncorrected numbers--meaning, post exactly what your SPL meter shows.
2. db from 1 meter away (this helps get an accurate reading for everyone since LP varies)
3. Room size cubic feet
4. What subwoofer set up are you running?
5. What setting of Master Volume and what do you have your sub dialed in at?


My Example...
1. 105db from Listening Position
2. 113db from 1 meter
3. 2300cuft (not sealed due to open doorway)
4. A single SVS 16-46Plus
5. Master Volume -4db Sub is calibated to 72db on SPL meter (uncorrected)

Then I can just copy and paste Items 1-5 and make a cool master list for us. I have this in other forums too with others already responding in this format....so I can take data from everyone and just copy and past for us :D


TO MAKE IT EASY FOR YOU......just copy and paste my information and just change the numbers to fit your data....that should take like 60seconds...

I have 2 listening positions that are ideal. One is 8 feet from the sub and the other is 3 feet. 2 rows of seating. Both are the center seat. It is always fun to watch darla tapping. I will still run my sub in the 16 hz tune. It sounds tighter that way although I lose spl. I can still hit reference anyway.

I have 2 listening positions that are ideal. One is 8 feet from the sub and the other is 3 feet. 2 rows of seating. Both are the center seat. It is always fun to watch darla tapping. I will still run my sub in the 16 hz tune. It sounds tighter that way although I lose spl. I can still hit reference anyway.

Sweet....give me a report from the various positions....Its cool if you have 2-3-4-5 sets of results...Once you post them in the format I'll copy and paste them to the master list :D

I'm really looking forward to seeing what people report

Use the lightning scene in WOTW. ;)


http://www.wardlink.com/vids/wotw123db.wmv

-Eli

Heres mine:
AVR: Pioneer VSX-515K

1. 96db from Listening Position
2. 105db from 1 meter
3. 1600cuft (sealed)
4. SVS 25-31PCi (tuned to 22hz)
5. Master Volume -25db( my 75db reference is -15db using avr pink noise) ,Sub is calibated to 75db on SPL meter (uncorrected)

1. 98db from Listening Position
2. 108db from 1 meter
3. 1600cuft (sealed)
4. SVS 25-31PCi (tuned to 22hz)
5. Master Volume -22db( my 75db reference is -15db using avr pink noise) ,Sub is calibated to 75db on SPL meter (uncorrected)

1. 101db from Listening Position
2. 110db from 1 meter
3. 1600cuft (sealed)
4. SVS 25-31PCi (tuned to 22hz)
5. Master Volume -19db( my 75db reference is -15db using avr pink noise) ,Sub is calibated to 75db on SPL meter (uncorrected)

Didnt want to go any louder, the room started to make weird noises.

EDIT: Using analog meter, with slow reading, will have to re-do it sometime.

Use the lightning scene in WOTW. ;)


http://www.wardlink.com/vids/wotw123db.wmv

-Eli

Eli are you willing to report on Darla on your system?

Actually once we get tired of DARLA. I'm going to start some other ones using the same exact format.

That way we know what we are posting!


AWESOME VIDEO!!!! 123db....what kind of SUBS DO YOU HAVE??

Dr. MDpain......i'm adding your information right now THANKS :D

Actually once we get tired of DARLA. I'm going to start some other ones using the same exact format.

That way we know what we are posting!


AWESOME VIDEO!!!!

Dr. MDpain......i'm adding your information right now THANKS :D

How could that scene ever get tiring. :D :p

I just checked the video and it is chapter 25...sorry.

I just set my speaker levels tonight, but it's too late to do any sub testing here....man, almost 2 am...I need to get to bed.

Hey man this thread looks like it will be going on for a while :) I'm glad we are taking interest in it. Whenever you get a chance post your data and I'll update the list :D

Hey man this thread looks like it will be going on for a while :) I'm glad we are taking interest in it. Whenever you get a chance post your data and I'll update the list :D
Brad,
Glad to see you come up with this and staying out of trouble :D. Good stuff and I like it. Of course a lot of folks would disagree saying there are too many variables blah blah blah but hey where the rubber meets the road, what do you get is a good way to go. Also anyone new, reading this thread should keep in mind, SPL and especially the way it is measured here is not the best measure for a sub and buying decisions should not be made with just this data. This should be taken as one dimension among the several dimensions. I see this more as a fun exercise.
Keep it coming!!
Thanks,
-Jai

Brad,
Just a suggestion and it is totally up to you. Turn off all the other speakers and measure with just the subwoofer turned on.
-Jai

That video was with dual PB12 +/2s stacked. I was the one that started the origional thread (posted above) with 117 from dual CS 20-39s.

I do not have either of those setups anymore.

-Eli

That video was with dual PB12 +/2s stacked. I was the one that started the origional thread (posted above) with 117 from dual CS 20-39s.

I do not have either of those setups anymore.

-Eli


WOW I loved the other thread too!! Man dual stacked PB12+2 must be SICK!! I'm jealous!!!

......


Jai...this is just that...a FUN thread for us to have some fun with our subs. I totally agree that speakers should be turned off the measurements made with JUST the subwoofer running. I actually did that, but forgot to mention that as part of the measurement procedure. Good Looking out! :D

WOW I loved the other thread too!! Man dual stacked PB12+2 must be SICK!! I'm jealous!!!:D

I had that going on for awhile. :D :D :D

http://i6.photobucket.com/albums/y211/mazersteven/d3933947.jpg?t=1172601234

Using a Digital SPL meter....72db Uncorrected.

C-weighing SLOW looking for the MAX.




You need to use Fast, not Slow. Fast samples at more frequent intervals, averaging over less time. It's better for finding peaks.



And I asked how you have your sub calibrated, meaning is it even with the speakers' level, or XdB hot? 72dB uncorrected means nothing without the context of what the speakers are calibrated to.

You need to use Fast, not Slow.



And I asked how you have your sub calibrated, meaning is it even with the speakers' level, or XdB hot? 72dB uncorrected means nothing without the context of what the speakers are calibrated to.


Speakers are at 75db...I guess I didn't fully understand what you were asking.

All speakers set to 75db....sub at 72db....

I realize that we need to use FAST not SLOW.

Realized that today in fact so I'll adjust that comment (Ed Mullen and I talked and he corrected my mistake!!) I learn something new everyday :) Thanks!

Also, if you're using the digital meter and not the analog, I don't think you need to add 3dB. For calibration anyway, depending on what you use to calibrate, go with the meter's reading or add maybe 1dB.

Ie., with my digital meter, I calibrate my sub to even ~ 1dB below my speakers for music, and 2~3dB louder than the speakers for movies. This is the dB reading on the SPL meter, not compensated.

1. 105.5dB on digital meter
2. haven't measured at 1m
3. 2800cf, open in rear
4. Hsu VTF-3 Mk2, Max Extension mode (1 port plugged), eq'd flat
5. -10 MV, sub calibrated 2~3dB flat


1. 107dB on digital meter
2. haven't measured at 1m
3. 2800cf, open in rear
4. Hsu VTF-3 Mk2, Max Extension mode (1 port plugged), eq'd flat
5. -7 MV, sub calibrated 2~3dB flat

Also, if you're using the digital meter and not the analog, I don't think you need to add 3dB. For calibration anyway, depending on what you use to calibrate, go with the meter's reading or add maybe 1dB.

Ie., with my digital meter, I calibrate my sub to even ~ 1dB below my speakers for music, and 2~3dB louder than the speakers for movies. This is the dB reading on the SPL meter, not compensated.


I also have the digital.....I do the same as you...only my sub is 3db lower than my speakers according to the meter (Ed Mullens recommended this to help protect the sub from bottoming since the 16-46+ is a little more prone to that in the 25-40hz range)

I'm posting your results....if you can share a 1M result with us if you want :) If not thats cool... :D

If I get a chance I'll post it.
But 1M measurements I don't think would be very valid in-room, much less than at the listening position. When you're in the room, you're still dealing with room acoustics. If you measure peaks at 1M in a circle pattern around the sub, I'm sure you'd get different SPL. If you're at 1M closer to the wall, you'd probably get higher SPL than at 1M towards the center of the room, etc.


BTW, I updated my above post to include the Max Extension mode setting.

1. 101dB on very old digital meter 11-12ft away...
2. 109dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -5 MV, sub calibrated 75dB flat with speakers

Cool....I cleaned up the thread and all results will be in the FIRST post for us to view.

I'm fixing cyberbri's post and adding frockc

:D

You might add a little tutorial to the first post about how to use the meter to get the proper reading (fast, Max, etc.)

Hey guys, I would like to comment but how do you read the Radio shack meter. When I did this test with a NSD/2 the red meter hand went strait to the 6+ marking...What does that mean? I had the receiver set to -20 and the nsd/2 set at 25hz...thanks from a noob..

Hey guys, I would like to comment but how do you read the Radio shack meter. When I did this test with a NSD/2 the red meter hand went strait to the 6+ marking...What does that mean? I had the receiver set to -20 and the nsd/2 set at 25hz...thanks from a noob..

IF you are on 100db on the dial....and the needle moves to +6 that means 100+6=106db...

WHen you ran the test where did you have the dial at? there are 7 different dial settings that you can cycle through...

1. 101dB on very old digital meter
2. 109dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -5 MV, sub calibrated 75dB flat with speakers

frockc,
How far away from the sub is the listening position? Is the resposne Eqed?
Make sure the meter is set to fast and record the max. If you can get one of the new digital meters that would be great. Also if you can do 0dB MV that will also be very helpful.
If you do the above, I would guess you will see about 113 dB or higher(101 + 5 for meter correction + 5 for MV set to 0 and another 2 for fast setting) at listening position.

Most people don't or can't listen at reference level, hence setting the sub a little hot to get some of the missing bass without the overpowering higher frequencies.

Of course when you run your sub hot, you don't want to push it to RL (unless you have something like the F113).

I usually watch movies around -10, give or take depending on how loud the dialog is. I just turn it up so the dialog is at a comfortable and clear level.

IF you are on 100db on the dial....and the needle moves to +6 that means 100+6=106db...

WHen you ran the test where did you have the dial at? there are 7 different dial settings that you can cycle through...


Thanks, I had it set at 80, sub is set at a crossover of 80 also...The needle pegs past the 6+, how do you determine if that is more than 106db? I have the response set to "slow" and the "weighting" set to "C"... Thanks again

Thanks, I had it set at 80h, sub is set at 80 also...The needle pegs past the 6+, how do you determine that is more than 106db? Thanks again


I was giving an example if you were using the 100db setting

if you are using 80db and you are at +6 then you are obviously at 86db...

Hope that helped :D

I was giving an example if you were using the 100db setting

if you are using 80db and you are at +6 then you are obviously at 86db...

Hope that helped :D

Thanks again, but how do I determine if I'm using the right setting. Should I have it at 100, 80, etc...

well you haev to use the setting that mades sense.

meaning....if you are not getting the needle to move you have it set too high.......if the needle is moving all the way to the right you have it set too low.

Find the level that makes the needle stay within the -5 to +5 on the scale...

(this is very hard to explain........if anyone can PM him and give me a better tutorial or even post it here please do so!!!)

But if it goes fully to the right, it means it's past the range. Try switching to 90dB. If it still goes all the way to the right, go to 100 on the switch.

The analog meter is good for about +/-6dB from where you are measuring. Ie., 74~86 when set to 80. If you are in the high 80s, change the setting to 90. The digital meter is good to about the same range, maybe 1dB more. But if you get 87dB when set to 80, set it to 90 and you may get a reading of 86dB.


m1fuller68,
If you want to find the peak SPL, and not just the level to calibrate, set the meter to FAST and MAX. Set it to SLOW when you want to even out the average SPL and calibrate.

1. 108
2. 115
3. 6800cf great room with 14ft vaulted ceiling
4. SVS PB-Ultra/2, ss 20Hz
5. -5 MV, 4db hot, nearfield

yea i'll give it a shot... i order one of those galaxy CM-140s i think from over at the home theater shack.com they have a deal going so i'll redo settings with that to when i get it... but i'm pretty sure i had it on fast and i'll try it again at 0db...

listening position is 11-12 ft away... the sub is just using the ARO eq...

I don't get it? Shouldn't 115db be the max with all channels running assuming all you guys ran at 0db reference?






Or is this just just to see how loud your sub can play?

If it is the 2nd then I can say my Portable Sub can easily hit 130db at listening position (with adequate amplification and if I actually sealed the enclosure) listening to rap music over the radio.
Here's what it did in-room with just a 50WPC amp:
http://i2.photobucket.com/albums/y22/crackyflipside/ht/SPL-loud3m.jpg

The setup:
http://i2.photobucket.com/albums/y22/crackyflipside/ht/th_ent-center.jpg (http://i2.photobucket.com/albums/y22/crackyflipside/ht/ent-center.jpg)


:D

Here are my numbers using a Radio Shack digital SPL meter:

1. 113 dB (13 feet away)
2. 121 dB (1 meter)
3. 2400 ft^3 living room, right wall completely open to 1500 ft^3 dining room/kitchen
4. Single JL Audio Fathom F113
5. 0 MV, sub calibrated flat to 85db with Avia

Master list updated! Keep the results coming!! The F113 numbers are truly impressive!!! I'd love to hear one of these little guys!!

Also .......directions updated too to remind people to use....

C-Weighting (Fast) and the MAX button if they have one on their SPL meter...

Also....if you can, turn off all your speakers and just record the sub SPL....

My Pioneer has a button on the front panel that easily allows me to turn off the speakers just letting the sub run....makes the testing a breeze!

But if it goes fully to the right, it means it's past the range. Try switching to 90dB. If it still goes all the way to the right, go to 100 on the switch.

The analog meter is good for about +/-6dB from where you are measuring. Ie., 74~86 when set to 80. If you are in the high 80s, change the setting to 90. The digital meter is good to about the same range, maybe 1dB more. But if you get 87dB when set to 80, set it to 90 and you may get a reading of 86dB.


m1fuller68,
If you want to find the peak SPL, and not just the level to calibrate, set the meter to FAST and MAX. Set it to SLOW when you want to even out the average SPL and calibrate.


Thanks guys, I'm starting to understand. I will update more after work.

Hey we all have to learn somewhere....that is why we are here! If you have any more questions we will all try to answer the best we can! Good Luck! :D

Also, if you're using the digital meter and not the analog, I don't think you need to add 3dB. For calibration anyway, depending on what you use to calibrate, go with the meter's reading or add maybe 1dB.

Ie., with my digital meter, I calibrate my sub to even ~ 1dB below my speakers for music, and 2~3dB louder than the speakers for movies. This is the dB reading on the SPL meter, not compensated.

The digital meter should be set to 'MAX'. This is a peak hold feature that will show the true peak dBSPL, instead of an averaged reading.

Of course, this should be pretty close for the scene in this thread because it's of long duration at the same frequencies.

Bosso

If it is the 2nd then I can say my Portable Sub can easily hit 130db at listening position (with adequate amplification and if I actually sealed the enclosure) listening to rap music over the radio.


How can you still hear???? :D Nice.

The digital meter should be set to 'MAX'. This is a peak hold feature that will show the true peak dBSPL, instead of an averaged reading.

Of course, this should be pretty close for the scene in this thread because it's of long duration at the same frequencies.

Bosso


Thanks Bosso..........I tried to reflect what you said in the "directions" in the first post.

Use MAX if you have a digital meter :D

Wow, I have never played this scene before with a good sub but my VTF-3 MKIII came in the other day so I went to Chapter 25 with the sub at about halfway up on the gain and the volume a little above halfway up and jeez it literally scared me.

It felt like getting punched in the chest and I though everything was going to fall off the shelves. After it was over I had the adrenaline shaky thing going on. Crazy :D

Also, if you're using the digital meter and not the analog, I don't think you need to add 3dB. For calibration anyway, depending on what you use to calibrate, go with the meter's reading or add maybe 1dB.

Ie., with my digital meter, I calibrate my sub to even ~ 1dB below my speakers for music, and 2~3dB louder than the speakers for movies. This is the dB reading on the SPL meter, not compensated.
Some newer analog and possibly digital RS meters are a little bit more accurate the the old ones, so you don't need to compensate that much (check HT Shack for more info). But in any case, even the C-weighting itself is around 3 dB at 30 Hz. But that doesn't really matter when everyone are using C-weighted meters. A flat SPL meter would show around 3-4 dB higher readings.

How can you still hear???? :D Nice.

I was in physical pain the day after because I wasn't using hearing protection.

Wow, I have never played this scene before with a good sub but my VTF-3 MKIII came in the other day so I went to Chapter 25 with the sub at about halfway up on the gain and the volume a little above halfway up and jeez it literally scared me.

It felt like getting punched in the chest and I though everything was going to fall off the shelves. After it was over I had the adrenaline shaky thing going on. Crazy :D


So how about you get out your SPL meter......dial your sub in to a proper 75-80db level (right now it sounds like you just plugged it in and turned the gain to half and just let it fly).

Then replay the scene and record the measurements and post them with the information in the first post in this thread. Thanks :D

The measurments posted here are beginning to look interesting to me and I am seeing a pattern but not sure what exactly I see until we have more data. Here is a request to folks who already posted their numbers. Brad, I hope you don't mind me asking this. If so, please let me know.

1. Turn off all the other speakers except the sub and repeat the measurments but this time calibrate to 75dB reference.

2. Start at -9 Master Volume, record max SPL. Do the same for -6, -3, 0, +3. At +3 you might get calls from the fire deparment but that's ok :).

Please post your measurments.
Why do this? I believe some of the subs here are compressing. Having an idea if your sub is compressing tells you if you are reaching limitations. If your MV scales lock-step with your measurments then you know that your sub is not showing signs of compression.
Thanks,
-Jai

If you can go +6, +9 and beyond, by all means do so :). The more data the better.

CAUTION: If your sub shows signs of bottoming out, back off.
DISCLAIMER: Do at your own risk. I cannot take any responsibilty for any kind of damage.
NOTE: If you have subsonic filters, use them.

I don't mind the request.

But

1. Turn off all the other speakers except the sub and repeat the measurments but this time calibrate to 75dB reference.


I dont think we should calibrate to 75db because everyones sub is different and they all have different needs. I like seeing peoples NATURAL measurements where they like having their sub calibrated at. More of a real world test. Plus I have them state where their sub is calibrated at which everyone can then take that into consideration.

2. Start at -9 Master Volume, record max SPL. Do the same for -6, -3, 0, +3. At +3 you might get calls from the fire deparment but that's ok :).

I have no problems saying "everyone do 2 or 3 set volumes"
BUT no way can I take my system to 0 or +3 or anything like that....I'll BLOW my sub because its not calibrated to do that....

I think people should give their "normal" listening volume (which I did for my -8db MV test) and at least 1 more test where they "push it" (like my -4db test)

I think your heart is in the right place, but I like this test being a natural test...meaning DON'T change a thing about your system.....Just pop in a dvd as you would on any other occasion and just get some data as if you were just watching a movie normally....(well besides shutting the speakers off and just testing the sub) :D

The only issue Brad is the people will never know if their sub is compressing. My big old Velodyne HGS-18 series II started crying early. The SVS Plus/2 kept going on and on and on until it shook everything around me. The minor changes I suggest won't take major time.

The only issue Brad is the people will never know if their sub is compressing. My big old Velodyne HGS-18 series II started crying early. The SVS Plus/2 kept going on and on and on until it shook everything around me. The minor changes I suggest won't take major time.


I'm all for people giving me as many test results as they want. By all means run the scene 10 times with different settings......

Just report the settings and the scores and I'll record them in the master log.

The more data, the more information we have....the more fun this is!

Hell.....when I get home I'll run it a couple more times at some different MV increments just to see if there is a pattern like you suggest....I just don't want to PUSH TOO FAR (I think -4db mv was my limit)


PS..........Also taking suggestions for the NEXT thread I start....

Same concept because I think this is really fun (and I can just copy and paste the first post with directions and what to post....PLUS we already know what information to give me, so thats is even easier)!

Right now my GUT is telling me WAR OF THE WORLDS---LIGHTNING SCENE!!!!

(note.....I'm not going to start a new thread until the interest dies out in this one....lets run this one as far as we can, collect and discuss as much data as possible and then once we have worn it out....then we will move on to the next challenge :D)

I just don't want to PUSH TOO FAR (I think -4db mv was my limit)

Calibrated at 72dB this seems a bit early for the limits of a 16-46. Are you setting your subsonic filter to 16Hz? Also are you making sure that you account for the RS meter error while calibrating? It appears that you are calibrating your sub a bit too hot.

1. 106 db using newest radio shack analog
2. 108 db also fast weight on both.
3. 1408 Cubic Feet. One open doorway and one 5.5'x3.5' opening
4. SVS PB-10-ISD
5. Master Volume -7db Sub Cal at 75db flat. No running hot for the test.

Calibrated at 72dB this seems a bit early for the limits of a 16-46. Are you setting your subsonic filter to 16Hz? Also are you making sure that you account for the RS meter error while calibrating? It appears that you are calibrating your sub a bit too hot.

Everything is set right. 16hz SS Filter, 3 ports open...

Ed Mullen even said that she'll bottom if I push her in that 30hz range. The woofer has to shoulder almost all the load on that Darla scene because the tuning is so deep...the ports really don't help at all at 30-40hz in that area is all on the woofer....

Now give me a 16-20hz scene and she'll shine I'm sure because the ports and the tuning will really kick in!
---------------------------------------------------------------------------------------------------------

72db is what the meter says on C---SLOW.....I don't think the DIGTIAL meter I'm using has the amount of error as the analog...(plus this is very new meter too)

Even at 72db...I cannot be REALLY over 75db even when you consider Error.....wouldn't you agree??

Everything is set right. 16hz SS Filter, 3 ports open...

Ed Mullen even said that she'll bottom if I push her in that 30hz range. The woofer has to shoulder almost all the load on that Darla scene because the tuning is so deep...the ports really don't help at all at 30-40hz in that area is all on the woofer....

Now give me a 16-20hz scene and she'll shine I'm sure because the ports and the tuning will really kick in!
---------------------------------------------------------------------------------------------------------

72db is what the meter says on C---SLOW.....I don't think the DIGTIAL meter I'm using has the amount of error as the analog...(plus this is very new meter too)

Even at 72db...I cannot be REALLY over 75db even when you consider Error.....wouldn't you agree??
Dude,
Remember what I told you a while ago. You "need" a second sub :D.

NO CRAP .....I cannot wait until I have the funds......won't be until Summer....maybe Fall

Too many projects to do in the house first....LIKE finish the BASEMENT for the Theater!!!

Jai....check out the first post....I recheckt the sub calibration...72db uncorrected with the digital meter on the NOSE!

Then I ran 5 different tests (2 times each to get the max number right)....check out the results I posted!

NO CRAP .....I cannot wait until I have the funds......won't be until Summer....maybe Fall

Too many projects to do in the house first....LIKE finish the BASEMENT for the Theater!!!

Jai....check out the first post....I recheckt the sub calibration...72db uncorrected with the digital meter on the NOSE!

Then I ran 5 different tests (2 times each to get the max number right)....check out the results I posted!
Ok just checked your post.
-10MV, 101
-6MV, 104 MV delta 4, system delta 3 (difference of 1dB is still in measurment noise)
-3MV, 107 MV delta 3, system delta 3

Typical SVS "Do or die" approach and I like that.

Ok just checked your post.
-10MV, 101
-6MV, 104 MV delta 4, system delta 3 (difference of 1dB is still in measurment noise)
-3MV, 107 MV delta 3, system delta 3

Typical SVS "Do or die" approach and I like that.


Whoa....delta WHAT.....explain my friend...I need to learn this stuff now because I'm out of my league with this terminology and what you are talking about.

delta = change

change in master volume versus change in measured (system) spl

"delta" is a very common word used in engineering.
http://dictionary.reference.com/browse/delta

"In Mathematics. an incremental change in a variable, as Δ or δ."

OK i get you....so what do you think about the results.....you were talking about compression before.....how would you interpret them and what would be your feeling..

From what you posted, it appears that your sub is not compressing heavily (sure there would be some slight compression) but it simply reaches it limits and bottoms out.
Let's say you increase the volume to 0MV and if you still get 107 and you increase more and you stay at 107, then your sub is compressing for sure. It could also mean that amp limiters or servo limiters are kicking. Your sub does not have a servo like the Velo. A sub that has such a limiter though it prevents you from bottoming out, it comes with a price. It will not allow you to reach even 107 (in this example). It might stop earlier at say 103. In other words it is very difficult to build a limiter that takes advantage of the very last drop of performance your sub can offer. So some subs make serious compromises. The HGS 18 series II is one such example.
I am curious to know how early the limiters kick in in the f113 and hence this question. Some folks prefer that a sub be indestructible and hate bottoming out. I belong to the other camp (no limiter) where I want a sub that will allow me to push it to the extreme.
Would I prefer a rev limiter in a BMW M5 or Ferrari. Heck No!

The measurements are

1 107 DB
2 120 db
3 2400 cuf
4 calibrated at 75 db

I've just received the sub and will remeasure this weekend.

I agree and I'm glad SVS built this sub to let the USER be in control. (Ed and I had a long talk about the limiters in their PLUS and Ultra subs vs the NSD line....)

I'd love to see other members here who already posted 1 or 2 sets of data to go back and do what I did.....start with a couple db below listing level, then go to listening level, and then do 1-2 more a little louder....(basically what I did).

I think the -4mv setting was def. the most POWERFUL.....things were shaking like an earthquake....but the accuracy was lost a little.....like the disticntion between the TAPS was lost. At -6mv I lost a little SPL, but the distinction in the TAPS was very accurate (still a damn good shaking)! At -8 I lost a little more SPL (and a little more shaking), and the TAPS were just a tad clearer than at -6db.... (the -10 and -8 setting sounded exactly the same, but -8db felt much more powerful)

Soooooooooooooooo....I think -6db, -7db and -8db are the point of pure joy for my system for this particular scene and movie...

The measurements are

1 107 DB
2 120 db
3 2400 cuf
4 calibrated at 75 db

I've just received the sub and will remeasure this weekend.

Before I add this I need to know how your 3.3 was set up...(just a little more information to go with the numbers)

2 ports open
1 port open, 1 blocked
with Turbo 2 ports open

?????

If you add bass traps, maybe an eq, you can get a lot more clarity and detail in that bass. In movies like WotW and The Haunting, it goes from being massive bass that makes you fear for the integrity of your sub, to controlled destruction where you can hear through the bass.

If you add bass traps, maybe an eq, you can get a lot more clarity and detail in that bass. In movies like WotW and The Haunting, it goes from being massive bass that makes you fear for the integrity of your sub, to controlled destruction where you can hear through the bass.

Trust me....the bass traps and maybe an EQ if needed will be added once this set up moves out of the living room into a dedicated SEALED theater room :D

1. 102 db using newest radio shack analog (fast on both)
2. 104 db from 1 meter
3. 2000 Cubic Feet. One open doorway and one 5.5'x3.5' opening and another one to stairs
4. Bic H-100
5. Master Volume -5 Sub Cal at 77db flat. 2 db hotter than speakers.

1. 107 db at regular viewing spot with radio shack digital (fast on C)
2. 111 db from 1 meter
3. 3300 Cubic Feet. AV setup with on 10 foot wall and rest opens into dining area/stairway and on through to kitchen.
4. Old PB12 box with new NSD driver, so it's downfiring.
5. Master Volume -34 Sub Cal at 75db flat.

Master Volume -34 Sub Cal at 75db flat.

did you mean to put master volume of -34?

that doesn't make sense... -34db is low....unless you have the reference level at like -25db or something...

I was in physical pain the day after because I wasn't using hearing protection.

I always use hearing protection when conducting measurements and test, I want to be able to enjoy the fruits of my labor. :D

1. 99db from listening postion
2. xxx-didn't try
3. 3000cu ft
4. a PB12-Plus colocated w/ PB12-ISD
5. Master Volume -12db Sub calibrated to 78db on SPL meter (+3db hot)

ok i redid my tests... C weighting fast Max... didn't see anypoint in going to 0 MV... when all three were scary lol...

1. 106dB on very old digital meter 11-12ft away...
2. 115dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -15 MV, sub calibrated 75dB flat with speakers at 0 MV

1. 108dB on very old digital meter 11-12ft away...
2. 119dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -10 MV, sub calibrated 75dB flat with speakers

1. 110dB on very old digital meter 11-12ft away...
2. 119dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -5 MV, sub calibrated 75dB flat with speakers

ok i redid my tests... C weighting fast Max... didn't see anypoint in going to 0 MV... when all three were scary lol...

1. 106dB on very old digital meter 11-12ft away...
2. 115dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -15 MV, sub calibrated 75dB flat with speakers at 0 MV

1. 108dB on very old digital meter 11-12ft away...
2. 119dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -10 MV, sub calibrated 75dB flat with speakers

1. 110dB on very old digital meter 11-12ft away...
2. 119dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -5 MV, sub calibrated 75dB flat with speakers


HOLY COW MAN!!

Those numbers are staggering for that "little" sub. First you have a HUGE open space from what you said, and still, at -5db MV you still hit 110db from your LP.

ok i redid my tests... C weighting fast Max... didn't see anypoint in going to 0 MV... when all three were scary lol...

1. 106dB on very old digital meter 11-12ft away...
2. 115dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -15 MV, sub calibrated 75dB flat with speakers at 0 MV

1. 108dB on very old digital meter 11-12ft away...
2. 119dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -10 MV, sub calibrated 75dB flat with speakers

1. 110dB on very old digital meter 11-12ft away...
2. 119dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -5 MV, sub calibrated 75dB flat with speakers

I don't understand why it's the same 119db when at -10MV and -5MV.Should'nt it be higher with -5 MV ?

I don't understand why it's the same 119db when at -10MV and -5MV.Should'nt it be higher with -5 MV ?

I think the subwoofer had reached its limits.

Looking at JL Audio's max output data (GP @ 1 meter), they were reporting 117.1db at 31.5Hz and 121.2db at 50Hz.

I don't understand why it's the same 119db when at -10MV and -5MV.
This is what I was looking for. It appears to me that the f113 is compressing.
frockc,
Can you observe to see if the clip/amp limiter light is coming on?

HOLY COW MAN!!

Those numbers are staggering for that "little" sub. First you have a HUGE open space from what you said, and still, at -5db MV you still hit 110db from your LP.
With almost half a foot :D of excursion, I am not surprised at all.

My guess.......Reaching his limit......You can only turn it up so loud before it will reach compression and maybe even bottom. I think his BEST volume was the -10db. At -5db as you noted, the data didn't really go up much more at all from the LP and leveled off at 1Meter.

Every sub has a limit!

And hey! Thats a lot of output for a single sub in a 4000cubic foot room!!!

With almost half a foot :D of excursion, I am not surprised at all.

LOL


And DAMN you guys are fast to respond....took me 60seconds to type that last one and I come back and there is already 3 responses!

with my results, when I turn up the MV (ex. 3db) I get roughly the same increase with the spl reading (+3db) for the sub. I'm no expert, so I don't know whats happening.

This is what I was looking for. It appears to me that the f113 is compressing.
frockc,
Can you observe to see if the clip/amp limiter light is coming on?

I don't think there is a clip / amp limiter light on the JL Audio... I've pushed my Fathom pretty hard to the point where I know its compressing, and have not seen any lights go off.

When I had the AV123 ULW-12, the amp light would turn red everytime the limiter was activated.

well yea the sub is not bottoming out when i get it to -5MV... one thing is i had the sub in the right side of my living room basically the middle of the first floor and then i shifted it to the left side which at the back has the staircase that goes to the upper 2 levels... did this because a much better FR on the left side since itz a true corner...

i did try the movie pulse at the end where the bass is just crazy and if i go to -5MV in the trueHD track over analogs it bottoms out.... but if i switch over to the coaxial output the bass actually sounds louder at the same -10MV but at -5MV it will bottom out also even though the sound is much louder...

really amazing sub... just brings a smile to my face since i had a NHT 12 before...
understandable the bottoming out at that point though so not really dissappointed...

here are some pics of my room....

One thing is on pulse i was making my lights flicker lol...

what is the clip/amp limiter light u are talking about jmcomp???

One thing is on pulse i was making my lights flicker lol...

That just adds to the movie experience LOL :cool:

When playing the Darla scene, things in my room started to rattle that never rattled before (windows, pictures on the wall), with my -4db result. (101db @ LP and 110 at 1 meter , 25-31PCi)

One thing is on pulse i was making my lights flicker lol...

what is the clip/amp limiter light u are talking about jmcomp???
Looks like your sub does not have such an indicator. Your room looks very difficult for a sub. Can you post a better picture of the corner where it is at now? The best way to load this sub would be to place it a corner so it is loaded by 2 walls and the floor.
If you calibrated with Avia, then your processor may have adjusted the LFE offset by 10dB. In TrueHD, I don't know how it works, but it appears that you have to claibrate the processor/receiver differently for TrueHD unlike coaxial input. You probably maybe unintentionally calibrating it 10dB hot with TrueHD. You may want to ask about this in the processor forum.

yea here is a pic it sits now where that tripod is... i calibrated the speakers using the processor itself to have ref 0 at 75db... the analogs i calibrated using the THX optimizer on the Finding nemo dvd and they all seem to be at 75db also... i think the analogs on the HD DVD player XA2 are just lower all around i know i had to boost the sub for 7.1 analogs by 10 db which is common for analogs...

Master Volume -34 Sub Cal at 75db flat.

did you mean to put master volume of -34?

that doesn't make sense... -34db is low....unless you have the reference level at like -25db or something...

MV on my Yamy says -34db when my SPL reads 75db with pink noise. I run klipsch references all around.

If that makes sense.

I wish we could get some people with MULTIPLE subs to do this.

Also I'd like to see some 3.3 with turbo and some HO with turbo.

I'd like to see some more SVS PLUS and ULTRA subs as well.

And how about NON SVS and HSU people.....anyone out there?

Maybe you can message some members and get them to take part in this :D

Agree. Some 3.3 and HO numbers would be a valuable addition.

I wish we could get some people with MULTIPLE subs to do this.

Also I'd like to see some 3.3 with turbo and some HO with turbo.

I'd like to see some more SVS PLUS and ULTRA subs as well.

And how about NON SVS and HSU people.....anyone out there?

Maybe you can message some members and get them to take part in this :D

Triple subs:

Two SB12Plus's hooked up in stereo with the L&R mains and a 2 x 10" TC-1000 6.5 cu ft. ported box, powered by Behringer EP2500, hooked up to LFE.

115 db in Listening area, about 14 ft.
126 db 1 meter from ported sub, Behringer lighting up like a Christmas tree :D

6120 cu ft. open room.

yea here is a pic it sits now where that tripod is... i calibrated the speakers using the processor itself to have ref 0 at 75db... the analogs i calibrated using the THX optimizer on the Finding nemo dvd and they all seem to be at 75db also... i think the analogs on the HD DVD player XA2 are just lower all around i know i had to boost the sub for 7.1 analogs by 10 db which is common for analogs...

Do you have a more recent pic with the sub in the pic? Would like to see it in your room layout.

1. 110 db from Listening Position (analog SPL Meter-fast)
2. 115 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 16 hz tune
5. Master Volume -10db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

1. 111 db from Listening Position (analog SPL Meter-fast)
2. 116 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 16 hz tune
5. Master Volume -5 db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

1. 111 db from Listening Position (analog SPL Meter-fast)
2. 117 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 16 hz tune
5. Master Volume 0 db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

My sub in the 25 hz mode will yield at least 6 more db's in my room.

1. 110 db from Listening Position (analog SPL Meter-fast)
2. 115 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 16 hz tune
5. Master Volume -10db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

1. 111 db from Listening Position (analog SPL Meter-fast)
2. 116 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 16 hz tune
5. Master Volume -5 db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

1. 111 db from Listening Position (analog SPL Meter-fast)
2. 117 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 16 hz tune
5. Master Volume 0 db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

My sub in the 25 hz mode will yield at least 6 more db's in my room.
Hi Mk,
Good to see you here. From you measurements it looks like the Plus/2 is compressing above MV -10. Have you measured the 20Hz mode?
Jai

Hi Jai,
How is the dts-20? Yes I know it is compressing, but the sub never bottoms or sounds bad and I am running it in it's least efficient tune. I will re-run it in its native tune tomorrow, I will even do it in the 20 hz tune. Remember this sub was built for 118 db's in the 16 hz tune, 121 db's in the 20 hz tune, and 124 db's in the 25 hz tune at 1 meter. We will see.

Hi James,
The DTS-20 is awesome!! The problem is completely gone and it rocks. I have to do a lot of listening and testing before I post anything on it. The size is still overwhelming us and in fact I have an interested buyer so I think I will be selling it shortly. Mine is a pretty large effective 7000 cu ft room. I already tried the Darla scene and at 17 ft away I think we saw 110dB uncorrected in a very old analog meter. My friend was holding the meter while I was listening in awe. I think I was at MV +6 calibrated at 75dB running 2dB hot. I Equed it last night but haven't had the opportunity to measure to contribute to the thread it. I get back home pretty late and don't want to bother the neighbors. I will post it over the weekend.
Regards,
-Jai

ok i redid my tests... C weighting fast Max... didn't see anypoint in going to 0 MV... when all three were scary lol...

1. 106dB on very old digital meter 11-12ft away...
2. 115dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -15 MV, sub calibrated 75dB flat with speakers at 0 MV

1. 108dB on very old digital meter 11-12ft away...
2. 119dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -10 MV, sub calibrated 75dB flat with speakers

1. 110dB on very old digital meter 11-12ft away...
2. 119dB
3. 4000cf first level of a townhome open stairs to upper two levels and lower level
4. JL fathom 113
5. -5 MV, sub calibrated 75dB flat with speakers

Good show,great showing in fact. I wonder what multiples do in a tiny space. :p :eek:

here are some more pics...

also i forgot to say i got a marantz 8500 so i dont think there is an easy way to disconnect the speakers so i left them on...

Fun thread!

For the 1 meter measurements, are you guys measuring equal distance from the ports(if you have them) and driver(s)?

Ok Brad. The big boys are coming in now :). Your thread this time has attracted some very good attention and you are making up for that other silly thread which got deleted. I for one really appreciate what you came up with. Did I motivate you with my 3 year old post on the PB2Plus and Darla scene? :) :) Just curious.

Fun thread!

For the 1 meter measurements, are you guys measuring equal distance from the ports(if you have them) and driver(s)?

Thats where I took mine from, and I have no idea what I'm doing. :eek:

I measured the 1 meter on top of the sub, in front, and on the sides. There was not any difference in my room. I happened to be walking around the room and noticed a better location for my sub(bass was much better there). Problem is my equipment rack is there. Maybe I will move it and put the sub there.

Ok Brad. The big boys are coming in now :). Your thread this time has attracted some very good attention and you are making up for that other silly thread which got deleted. I for one really appreciate what you came up with. Did I motivate you with my 3 year old post on the PB2Plus and Darla scene? :) :) Just curious.

I'm not sure what motivated me......but I'm very motivated to create more threads like this to keep things fun for us! :D

Jai....are you going to post up some numbers.....from what I remember you have a pretty sweet system yourself!!!

I'm still anxious to see some 3.3 and HO with turbo numbers....

Updated first post with new results.

MKtheater.....I agree that it is interesting that your numbers didn't really change even with your increase in master volume. That is showing compression. Now I know its not bottoming out, but couldn't you get more out of that sub if you tweek it a bit so that you are not hitting that compression point?

I am running my sub in the 16 hz tune. This sub was made to run in the 25 hz tune. I will change it tonight and see what I get and post them. The highest I have ever hit in the 16 hz tune was 118 db's with war of the worlds from my back seats which is 1 meter away. Also I don't have it corner loaded, it is in the middle of my back wall. If I place it in the corner of the back wall I will get more db's, Maybe I can try to move it around again.

hehe.... the Darla scene is a definite show-stopper... I listened to it about 100 times in three days with three Gothams and two Fathoms fired up while conducting demos at CEDIA a couple of years ago... at the end of each day, I felt like I had gone a few rounds with George Foreman. We were hitting ridiculous levels (over 120dB SPL at the seats measured with a Sencore meter).

The other scene in Nemo that is extremely demanding is the scene where the old submarine dislodges from the underwater shelf and scrapes along until it crashes into the opposing cliff wall. This has more true infrasonic energy than the Darla scene and provides a very good glimpse into what a subwoofer system can do at extremely low freq's.

Manville Smith
JL Audio, Inc.

I'm not sure what motivated me......but I'm very motivated to create more threads like this to keep things fun for us! :D

Jai....are you going to post up some numbers.....from what I remember you have a pretty sweet system yourself!!!

I'm still anxious to see some 3.3 and HO with turbo numbers....
I will post this weekend. Brad for your next thread consider "I Robot" YOu are in a car accident.

Thats where I took mine from, and I have no idea what I'm doing. :eek:
I would imagine with placement, it would be hard to do for at least some of us.

If I have time, I will try my 3.3 w/turbo this weekend.

hehe.... the Darla scene is a definite show-stopper... I listened to it about 100 times in three days with three Gothams and two Fathoms fired up while conducting demos at CEDIA a couple of years ago... at the end of each day, I felt like I had gone a few rounds with George Foreman. We were hitting ridiculous levels (over 120dB SPL at the seats measured with a Sencore meter).

The other scene in Nemo that is extremely demanding is the scene where the old submarine dislodges from the underwater shelf and scrapes along until it crashes into the opposing cliff wall. This has more true infrasonic energy than the Darla scene and provides a very good glimpse into what a subwoofer system can do at extremely low freq's.

Manville Smith
JL Audio, Inc.

Thanks for the input! That sub scene really did have some nice infrasonic engery!

I picked this scene because of the more common 30hz bass that most everyones subs can handle.

Next on the list will be something a little more challenging in the lower bass regions :)

I am running my sub in the 16 hz tune. This sub was made to run in the 25 hz tune. I will change it tonight and see what I get and post them. The highest I have ever hit in the 16 hz tune was 118 db's with war of the worlds from my back seats which is 1 meter away. Also I don't have it corner loaded, it is in the middle of my back wall. If I place it in the corner of the back wall I will get more db's, Maybe I can try to move it around again.


So 16hz tune I thought only 1 port was plugged on the PLUS/2? I thought it was 20hz native tune (3 ports open)?

I know the NSD/2 is 25hz native...

I picked this scene because of the more common 30hz bass that most everyones subs can handle.
It is a good pick, more people can participate. Who doesn't like a good drag race? :)

Chang I know we would all love to see what the 3.3 with turbo can do :D

25 hz is the native tune on mine, which is a older(2 years) and called the pb2-plus. I have 2 ports blocked with the filter set on 16 hz. When I corner load it I do get more spl. Yes this sub is a different animal in the 25 hz mode. Tonight I will set it to 25 hz. When I get the new subs I will also test this scene as well. My goal with the new subs is better sounding bass, not more spl. I will probably get more spl, but the better bass is the challenge.

Ahhhh. I thought you had the new Plus/2.

the PB2-Plus explains it all. 25hz tune should be a very powerful experience!

I agree that if you have the SPL you need from a mid wall placement and it sounds better than the corner loaded setting then by all means keep it center walled.

Plus hell......even at your MV-10db you still had some GREAT output in your 16hz tune mode!!!! :D

Even SVS does not recommend the 16 hz tune with my sub. My goal was to reach reference level bass from the center seat.

I almost pulled the trigger on the new Plus/2 but my intent was to run it in 16hz mode so I had that extra extension that I crave.

After hearing the Plus/2 in 16hz tune (2 ports open) and the 16-46+ Native 16hz tune (3 ports open) It was clear to me that the 16-46+ was the way to go since I have more port area open to let the massive amount of air that it takes to produce that subsonic bass fly freely.

Even ED Mullen said if I wanted a 16hz tuned sub that 100% I should get the 16-46+, and I agree with him after hearing it with my own ears.

NOW OF COURSE the Plus/2 had more output when going up against just a single 16-46+ (2 woofers vs 1). Thats why I'm going to get a 2nd PC+ so I have 2 woofers too :D

Of course the Plus/2 vs the Dual PC+ in terms of price is a little different as well. Sure I'm paying a little more in the end going the route I am, but like we all know....we get what we pay for :cool:

Another quick question...are you guys taking measurements with the speakers on or off?

Check post #1 I have it in the directions....

****Note....when running this test turn off main speakers if possible so you are just measuring the subwoofer output

Check post #1 I have it in the directions....

****Note....when running this test turn off main speakers if possible so you are just measuring the subwoofer output
Thanks...I missed that.

What about crossover settings? What FR are most of you sending to the sub?

Thanks...I missed that.

What about crossover settings? What FR are most of you sending to the sub?


I would bet that most of us use 80hz.....but really I don't think that matter much since the scene we are using is so dominated by the 30hz signal....

Next on the list will be something a little more challenging in the lower bass regions :)

Sounds like you need to start another thread. :)

On a Rat Shack analog "c" "fast"

Mirage S12
2000 cu ft open to kitchen
MCACC calibrated
just the sub on other speakers off

-2MV hit 111db :eek: from listening position (about 15 feet away)

It seemed like that is were my S12 maxed out at.

On a Rat Shack analog "c" "fast"

Mirage S12
2000 cu ft open to kitchen
MCACC calibrated
just the sub on other speakers off

-2MV hit 111db :eek: from listening position (about 15 feet away)

It seemed like that is were my S12 maxed out at.

Those are some nice LP numbers, especially in that open room.

Anybody with an Elemental Design subwoofer care to throw their hat in the ring?

I have a question regarding MV settings.

For subwoofer master volume setting is -5db on my Bic H-100.

Is everybodies MV setting is similar to what I have above and I listened at -5 below reference levels.

Could somebody please clarify this for me?

The master volume setting we are refering to is what is on your receiver. Meaning system volume.

The sub setting is irrelevant because we are taking into consideration the sub calibration which is a balancing of the receivers sub channel and the subwoofers gain...

I would bet that most of us use 80hz.....but really I don't think that matter much since the scene we are using is so dominated by the 30hz signal....
OK....but every little bit counts towards a drag race! :D

you say drag race...

But seriously this is not a competition at all. In fact its just to have fun with the subs we own and love and the movies most of us own because of our HT.

I like what Jai was doing with looking at numbers to try to see if compression was being reached. Something like that is very helpful to a user.

you say drag race...

But seriously this is not a competition at all. In fact its just to have fun with the subs we own and love and the movies most of us own because of our HT. .
Well, when you post numbers and compare, it really does turn into a drag race. Otherwise, why post numbers? :)

Actually all volume and reference settings are irrelevent because we are turning off our mains. It really boils down to measuring the loudest the sub or subs can play a particular scene.

The master volume setting we are refering to is what is on your receiver. Meaning system volume.

The sub setting is irrelevant because we are taking into consideration the sub calibration which is a balancing of the receivers sub channel and the subwoofers gain...

Well my MV has a dail starting from 0 to 79. I ran these at 50.

What does MV 0db means? I have individual db settings for speakers and sub which I calibrated with speakers at 0db and sub at -5db. On the sub gain is at 1/3rd.

Btw my reciver is Onkyo 504.

Actually all volume and reference settings are irrelevent because we are turning off our mains. It really boils down to measuring the loudest the sub or subs can play a particular scene.

And your point is......

And your point is......

...That the volume and reference settings that folks are noting are irrelevent.

All current SVS dual driver subs have a 25hz native tune.

20hz = 1 port blocked

16hz = 2 ports blocked


-Eli

OK

2 people both calibrated to 75db for their subwoofer

person A might have a -5db for the recievers sub channel

person B might have 0db for the recievers sub channel

Both can still be at 75db...the difference comes then on the subwoofers gain dial.

Person A has a higher gain setting and person B has a slightly lower gain.

That is why the SUB level doesnt matter ....

All we care about is the overall db of the subwoofer itself.

All current SVS dual driver subs have a 25hz native tune.

20hz = 1 port blocked

16hz = 2 ports blocked


-Eli


My mistake... you are 100% correct. Here it is right from the SVS Plus/2 website...

"As it is, the PB12-Plus/2 is tuned stock to 25Hz (with all three ports firing), which will yield strong response to under 20Hz with mid-sized rooms and corner placement. Above this point is where 99% of all music and movie bass is centered. It also is the most efficient mode for the PB12-Plus/2; with plaster shattering sound pressure level capacity, and incredible accuracy to the source material at all sound pressure levels, low or loud. Want deeper? If you willing to give up a few decibels in SPL capacity above 25Hz (and the PB12-Plus/2 has "headroom galore", then insert one, or even two port plugs, click over the subsonic filter knob to the corresponding 20Hz or 16Hz position and you are there. "

Those are some nice LP numbers, especially in that open room.

Anybody with an Elemental Design subwoofer care to throw their hat in the ring?

I'll can probably post some results with an a7-600 but not for at least 3 weeks as I'm still building the room.

OK

2 people both calibrated to 75db for their subwoofer

person A might have a -5db for the recievers sub channel

person B might have 0db for the recievers sub channel

Both can still be at 75db...the difference comes then on the subwoofers gain dial.

Person A has a higher gain setting and person B has a slightly lower gain.

That is why the SUB level doesnt matter ....

All we care about is the overall db of the subwoofer itself.

Still I am confused. What does MV 0db means? Is it for sub on the receiver?

It means master volume at 0 db's. This is the reading on the reciever or processor. It is a reference point. We all calibrate are speakers, including the subwoofer at 75 db's. What this means that when at 0 on the volume you are reaching 75 db's with normal conversation, some dvd's are recorded higher than that as well. Now if you have a receiver or processor that just reads 0-99 with 99 being the loudest then you can pick a number you want to be reference levels(calibrated at the 75 db's). So if you pick say 50 to be reference levels and you play at 50, you are at 0 db's for the rest of us. 45 would be -5 and so on. 55 would be +5. I hope this helps.

bgillyjcu ,
I used to own the 16-46 cs+. It is a great sub. I actually coupled that with a 16-46 cs and the 2 together would reach 115 db's at the listening position in a different room that was actually bigger. I would agree with you that my plus 2 was not meant to be used as a 16 hz sub but it can do it really well. Like I said I will run the test in its native tune and I have no doubt I will hit 120+ db's at 1 meter without corner loading it.

bgillyjcu ,
I used to own the 16-46 cs+. It is a great sub. I actually coupled that with a 16-46 cs and the 2 together would reach 115 db's at the listening position in a different room that was actually bigger. I would agree with you that my plus 2 was not meant to be used as a 16 hz sub but it can do it really well. Like I said I will run the test in its native tune and I have no doubt I will hit 120+ db's at 1 meter without corner loading it.


wow 115db is impressive and in a larger room and without having 1 of them be a plus model too.

Maybe I can get into the 120's in my room size when I have duals :D

The Plus2 is a great sub because of the options it gives you. It gives you the choice of letting it dig deep and lose a little SPL......or be an SPL monster but lose the deep.

That flexiblity is very very fun ;) Can't wait to see your new numbers. Thanks for taking part in this...I hope everyone is having as much fun as I'm having.

I'm saying it now....War of the Worlds DTS LIGHTNING SCENE (Chapter 4) Subwoofer Test Thread will be posted soon.

BUT

Darla's Thread is still going strong so I'll let this go for a while longer so that way we can give it our full attention and maybe we can discuss some numbers of the subs too since we have a good amount of data now.

That will be our next fun test :D

I think I will change the tuning anyway because I don't want compression of the sub, I want headroom. Besides, running it in 25 hz tune and 16 hz tune have more similarities than differences. My new subs coming will be monsters, each one is bigger than the plus 2 and each one can hit more spl than the plus/2. The question will be sound quality. I will mention the name of the sub if it is worth it.

It means master volume at 0 db's. This is the reading on the reciever or processor. It is a reference point. We all calibrate are speakers, including the subwoofer at 75 db's. What this means that when at 0 on the volume you are reaching 75 db's with normal conversation, some dvd's are recorded higher than that as well. Now if you have a receiver or processor that just reads 0-99 with 99 being the loudest then you can pick a number you want to be reference levels(calibrated at the 75 db's). So if you pick say 50 to be reference levels and you play at 50, you are at 0 db's for the rest of us. 45 would be -5 and so on. 55 would be +5. I hope this helps.


A lot of receivers use 0 dB simply as all the way up.

My receiver calibrates the 75 dB test tone as -26 dB on the MV control. So, in my case -30 dB is 6 dB below Reference Level.

I think I will change the tuning anyway because I don't want compression of the sub, I want headroom. Besides, running it in 25 hz tune and 16 hz tune have more similarities than differences. My new subs coming will be monsters, each one is bigger than the plus 2 and each one can hit more spl than the plus/2. The question will be sound quality. I will mention the name of the sub if it is worth it.


A lot of subwoofer amplifiers use a soft clipping circuit (AKA volume limiter). When the output level is measured to be near the clipping voltage, the volume is turned down in the amplifier to prevent damage.

You can run out of SPL's by compression, or by limiter circuits cutting in as intended by the manufacturer.

It means master volume at 0 db's. This is the reading on the reciever or processor. It is a reference point. We all calibrate are speakers, including the subwoofer at 75 db's. What this means that when at 0 on the volume you are reaching 75 db's with normal conversation, some dvd's are recorded higher than that as well. Now if you have a receiver or processor that just reads 0-99 with 99 being the loudest then you can pick a number you want to be reference levels(calibrated at the 75 db's). So if you pick say 50 to be reference levels and you play at 50, you are at 0 db's for the rest of us. 45 would be -5 and so on. 55 would be +5. I hope this helps.

Thanks for the reply. It makes sense now. So I played at -5 to hit 102db from my seating position on Bic H-100

Good Lord 0 is loud on my setup. Maybe I just am afraid to push things. I have a unique situation though.

I have def tech 7001sc mains and have them set to large and the bass to frt only so I really cannot just turn the mains off. I may be able to remove the jumpers in the back of the speakers though.

I reached 110 db from my listening position at around -10 but I will try and redo the test the same as others. I can hook up the lfe only and do it like that.

I think you mean 4 db's below reference.

reference level is loud when you set it to 75 db's. I actually watch some movies like this. Awesome visceral experience. Any movie recorded hot I turn down. I never go below -10 when I watch a movie though. I want to experience the theater not watch a big TV.

Ya honestly with speakers on -6 and -4db MV is REALLY REALLY LOUD!!!!

A comfortable LOUD volume for me is like -8 even -7db below reference MV.

(My friends think I'm nuts...but hey, I like it LOUD like the theater :D

For me -5 below reference is plenty loud. I listen at -15 or -10 with my family.

I think I will change the tuning anyway because I don't want compression of the sub, I want headroom. Besides, running it in 25 hz tune and 16 hz tune have more similarities than differences. My new subs coming will be monsters, each one is bigger than the plus 2 and each one can hit more spl than the plus/2. The question will be sound quality. I will mention the name of the sub if it is worth it.

hmmm How about a happy medium of 20hz tune.

You wont reach compression as fast as you were in 16hz mode.....but you can still dig deeper than the 25hz tune and still gain headroom over the 16hz mode....

Either way the 20hz and 25hz mode will give you more headroom and probably
an insane db number for Darla :cool:

PS......stop teasin us! What are these new mystery subwoofers!!!!

Each cabinet weighs 110 pounds and has an 18 inch woofer which is horn loaded. No amp, I already purchased a Sampson s-2000 to power them. BTW that sampson amp is awesome even with my main speakers. I had to turn down the amp 10.5 db's just to level match to my Gemstone. They are supposed to have a range of 20-125 hz. One can reach 128-9 db's so 2 of them is just alot of headroom because I still want just reference levels at all seats. They come from the pro-audio side and I am curious. WAF factor is very bad, they are huge and ugly, but I have a dedicated theater and can hide them, No one knows where my SVS is now unless I show them. I don't want to create hype for this company because they could just be loud boom boxes. I will see. I am hoping not due to the horn loaded design.

Well once you give them a good testing.....let us know.

I'm interested at least, so if no one else is.....just PM me about your thoughts and feelings about your new subs :)


I just reread that too....ONE can reach 118-119....MY GOODNESS.....TWO will be in the 120's maybe 130ish....

I wonder about the SQ just like you....only time will tell!!!! I bet you are excited!

One sub is capable of 128 db's alone so 2 would be at least 131 db's. Will keep you posted.

I'm saying it now....War of the Worlds DTS LIGHTNING SCENE (Chapter 4) Subwoofer Test Thread will be posted soon.

BUT

Darla's Thread is still going strong so I'll let this go for a while longer so that way we can give it our full attention and maybe we can discuss some numbers of the subs too since we have a good amount of data now.

That will be our next fun test :D

Funny you mention this scene. I just had my audio calibrator buddy at my place yesterday to dial in my Blu Ray player and tweak my subs as after adding a new processor, things had seemingly changed in my low end.

At the end we played the War of the Worlds (DTS) scene. Now using a RTA, we came to an overall SPL of 122 db at the listening position (peak at 20 Hz) measured 16 ft from subs. THe gain was set at -5 from reference, so we could have gone farther. My room is @5200 cubic ft.

My calibrator sent me an email after seeing this thread, I'll paste a part of his email:


Compare the posted numbers (SVS, HSU and JL Audio) with what we observed
yesterday. A different scene and movie (a hotter recording to be sure) - EDIT - not the Darla scene but War of Worlds) - but comparing the highest numbers posted (113 dB at the listening
position for a JL Audio F113) compared with the highest numbers we saw
yesterday (122 dB at the listening position) means that your subs were
putting out 8 times the acoustic energy of the JL Audio (9dB) higher.
Thanks,

Chris

BTW- I use Servodrive B-DEAP32 subs (2) each powered with 2500W Crown K2 amps. I believe the subs are 200 lbs each.

That War of the Worlds Tri Pod scene is a real ball buster!

Impressive.....Just made a new thread for the LIGHTNING SCENE. Read the main thread and post your information if you can....there are 6 peices of data for the thread you'll need.

Althought I made a new thread.........I hope this thread continues to get more data!! Don't let this one die just yet!

1) 110
2) N/A
3) 880 Cubic Feet Sealed
4) HSU VTF-2 MK3 Max Extension 1 Port Plugged
5) Master Volume 75 of 99, Sub 77db On Rat Meter

All speakers at 75db (except sub) with this volume setting.

1) 110
2) N/A
3) 750 Cubic Feet Sealed
4) HSU VTF-2 MK3 Max Extension 1 Port Plugged
5) Master Volume 75 of 99, Sub 77db On Rat Meter

All speakers at 75db (except sub) with this volume setting.


WAIT....750 cubic feet sealed?

Are you sure thats not square feet?

Cubic is Lenght x width x hight

(not trying to sound like a dummy here....just asking to make sure..)

Hrm shame ,im getting port noise from the darla tap scene, its pretty noticable to... ,klipsch rw-12d sub.

Hrm shame ,im getting port noise from the darla tap scene, its pretty noticable to... ,klipsch rw-12d sub.

at what Level do you have the Sub Calibrated at?? it is possible you are just running it too hot and you are reaching its limit too soon because of it...

Plus I just did some quick research and that subs lower limit is about 25hz.....so a 30hz powerful scene is def. going to give that sub a workout and probably give you port noise if you are pushing it hard...

at what Level do you have the Sub Calibrated at?? it is possible you are just running it too hot and you are reaching its limit too soon because of it...

Plus I just did some quick research and that subs lower limit is about 25hz.....so a 30hz powerful scene is def. going to give that sub a workout and probably give you port noise if you are pushing it hard...

On the sub itself I have the volume set at 0dB and also 0db on the receiver's sub level adjustment.

Ive only had this setup a few days so im still trying to figure out all the settings , One thing im not so sure about is this "Double Bass" feature on my Onkyo receiver , its enabled by default but perhaps I want this disabled? the manual says the double bass feature sends any bass going to the front speakers to the subwoofer as well.

Do you have an SPL meter?

You need to to properly calibrate your speakers and subwoofer...

you are right, turn off the double bass and set the crossover at 80hz....

i had a question i posted some pics of my sub... does it matter where ur sub is positioned in a room that is open to the upstairs as well as downstairs(basement door can be closed)... my whole first floor has the living room on the left half and the dining room on the right side which has the kitchen just behind the dinning room...

my sub is in the front left corner of the living room which the back left corner of the living room is the stairs to the two upstairs floors... can that effect the sub in a negative way? as opposed to it on the right side of the living room which is basically the middle of the first floor...

i put it on the left side because i measured a few places and got the best response there...

I was going to suggest that same place after reading just your first paragraph. Sounds like you did the right thing.

I'd leave it there and be happy knowing you tested it and got the best response there :D

Here are the new numbers with 25 hz tune
1. 111 db from Listening Position (analog SPL Meter-fast)
2. 118 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 25 hz tune
5. Master Volume -10db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

1. 114 db from Listening Position (analog SPL Meter-fast)
2. 120 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 25 hz tune
5. Master Volume -5 db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

1. 116 db from Listening Position (analog SPL Meter-fast)
2. 122 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 25 hz tune
5. Master Volume 0 db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

EDIT: Disabling double bass didnt seem to reduce the bass output in this scene and im still hearing the same port noise ,I took the cover off the subwoofer during and the woofer does move *A LOT* , perhaps I need to lower the subwoofer's volume even further? I dont have the receivers main volume up all that loud when testing it (volume 43).. Other than the port noise the actual bass output is quite impressive during this scene but I dont have an SPL meter for actual numbers (yet).

I have 2 weeks to decide If I want a refund on the sub ..after skimming through this forum it seems I could get a better subwoofer for even less than I paid , Im wondering if the HSU VTF-3 MK2 would be a worthy exchange?, I was looking at the MK3 but my room is only 10hx12w13l so an MK3 might be overkill?

You guys have some really strong numbers! I still have to EQ my setup as I'm down 7db at 30Hz. I can get another 5 db if I move my sub but I need to keep it where it is due to WAF.

1. 100dB on analog meter
2. haven't measured at 1m
3. 2750cf, open to hallway
4. Hsu VTF-2 Mk3, Max Extension mode (1 port plugged)
5. "0" MV, sub calibrated +3dB

WAIT....750 cubic feet sealed?

Are you sure thats not square feet?

Cubic is Lenght x width x hight

(not trying to sound like a dummy here....just asking to make sure..)


Take that back 880 cubic feet. After you asked I got out the tape measure to see what it really was. Still a small room in a small house.

Here are the new numbers with 25 hz tune
1. 111 db from Listening Position (analog SPL Meter-fast)
2. 118 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 25 hz tune
5. Master Volume -10db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

1. 114 db from Listening Position (analog SPL Meter-fast)
2. 120 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 25 hz tune
5. Master Volume -5 db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.

1. 116 db from Listening Position (analog SPL Meter-fast)
2. 122 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 25 hz tune
5. Master Volume 0 db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.
Killer numbers for a sub at that price. Can you do 20Hz too James? I see just minimal compression.
Thanks,
-Jai

My wife won't let me do that test again until I shovel my roof. She thinks the roof will cave in. So Maybe tomorrow. It is weird to play the subwoofer without the other speakers.

I have a SVS 20-39pci sub in a 15x28x8' room (3360 cubic feet). In addition, it has 2 door openings that can't be closed nad an opening to a dining room kitchen area. I am really surprised at my numbers, and this is at the high end of my listening level, but not the system or sub's max.

1) 104 Ddb at the listening position (~12 feet from sub).
2) 113db at 1 meter from sub (RS Analog meter (uncorrected), measured with only sub on).
3) 3360 cubic feet (opening to dining room and 2 doors)
4) SVS 20-39pci (EQ with Denon AVR - Audessey)
5) 0MV

Regards,
Darrell

Here are the new numbers with 25 hz tune


1. 114 db from Listening Position (analog SPL Meter-fast)
2. 120 db from 1 meter (analog SPL Meter-fast)
3. 2300cuft (sealed )
4. A single SVS PB12/plus/2 tuned in the 25 hz tune
5. Master Volume -5 db Sub calibrated to 75db on SPL meter. Ref is 0, all speakers are set to 75 db's.




This one looks to be the sweeeeet spot!!!!

I'm with Jai....can we get you to try 20. :D

You guys act like you are bothering me, this stuff is fun. The problem is that I only could do this when everyone is asleep(kids anyway). I will run 20 hz tune tonight. I am guessing 119-120 at 1 meter and 112-113 at front and center seat. BTW that 122 reading is at the back center seat since it is 1 meter away. Everyone loves the back row. It is like having a sub and a buttkicker rolled into one.

My new subs are arriving today. 350 pounds for 2 boxes. I have high expectations for these. They are very effecient at 100 db's at 1 watt and can handle 750 watts rms and 1500 watt peak. Now add 6 db's for 2 and you can figure out how loud they can play. The question will be sound quality, extension, and most important, pure fun factor while watching a movie. If my cables arrive as well I will be running Darla with these too.

You guys act like you are bothering me, this stuff is fun. The problem is that I only could do this when everyone is asleep(kids anyway). I will run 20 hz tune tonight. I am guessing 119-120 at 1 meter and 112-113 at front and center seat. BTW that 122 reading is at the back center seat since it is 1 meter away. Everyone loves the back row. It is like having a sub and a buttkicker rolled into one.
As a rule, subs are turned off at 10:00pm in our home. So I totally understand.

That is when I could let it rip, Thanks God for a big house and a dedicated room that is insulated very well. The kitchen takes a beating(directly above the theater) but the bedrooms are silent. My previous house had the theater(really a basement with my equipment) right under the bedrooms, forget about movie watching at night.

Well I finally did this test. Dual SVS CS-Ultra in the same corner powered by EP2500. Calibrated 75 dB w/ RadioShack analog SPL meter @ 0mv. Bass xover 80Hz. Sub channel only. Room is ~7,000 cubic ft.

Sorry for not following the format but I took a lot of samples. SPL format is LP/1m.

20 Hz tuning

-15mv: 93/105
-10mv: 98/109
-5mv: 101/112
0mv: 105/116
+5mv: 108/119

16 Hz tuning

-15mv: 92/104
-10mv: 97/108
-5mv: 99/112
0mv: 104/115
+5mv: 107/118

I heard new things shake and rattle at +5. Got some of that "chest-pounding" that everybody raves about for +5 @ 1m. Wish I had a smaller room. Saw the clip light briefly flicker once at +5 so I stopped there.

I think in my next place the subs will be nearfield. Yeah, definitely nearfield :D

What do you guys mean when you say "-10 MV" ,Can someone point me to another thread or source of info on what all this stuff means :o

Well I finally did this test. Dual SVS CS-Ultra in the same corner powered by EP2500. Calibrated 75 dB w/ RadioShack analog SPL meter @ 0mv. Bass xover 80Hz. Sub channel only. Room is ~7,000 cubic ft.

Sorry for not following the format but I took a lot of samples. SPL format is LP/1m.

20 Hz tuning

-15mv: 93/105
-10mv: 98/109
-5mv: 101/112
0mv: 105/116
+5mv: 108/119

16 Hz tuning

-15mv: 92/104
-10mv: 97/108
-5mv: 99/112
0mv: 104/115
+5mv: 107/118

I heard new things shake and rattle at +5. Got some of that "chest-pounding" that everybody raves about for +5 @ 1m. Wish I had a smaller room. Saw the clip light briefly flicker once at +5 so I stopped there.

I think in my next place the subs will be nearfield. Yeah, definitely nearfield :D
I had dual CS-Ultras too with a Crown K2. Killer subs. It was almost like it would rip off the floor boards at +5. Minimal compression and doesn't it feel like they ask you give me more :)

What do you guys mean when you say "-10 MV" ,Can someone point me to another thread or source of info on what all this stuff means :oMV is the Master Volume. The number is what a particular AVR shows for a location on the dial. If you have a well calibrated AVR, the numbers should correspond to the increase in volume. So, -5 should be 5db higher then -10. The actual volume you get is determined by where the MV was set when you calibrated to volume for each channel. If you calibrate your sub for 75db with the MV set to -10, then -10 is your reference volume setting. If you calibrate to 75 with the MV at 0, then 0 is your reference level.

1.) 109db approx. 12 feet
2.) 115db 1 meter
3.) 2800 cuft room open to hallway on one end and kitchen on the otherside
4.) Single JL Audio Fathom F112
5.) ARO corrected, sub level calibrated at 75db

I am a comlete noob and am in the middle of a professional install. I have no furniture and am set up in a completely live room. This is a new addition and I have no furniture or carpet and a very nice concrete floor. Hopefully, the rug and furniture will arrive soon. The Monitor Audio RW 12 sub just friggin scared the bejeezus out of me. I had been testing the system at a modest -20 with the opening scenes from Saving Private Ryan. That was awesome. I read this thread and grabbed my kids Nemo DVD and popped it in. I set it at 0 and proceeded to scare myself half to death. Good lord. I can't imagine more sub. That practically blew the friggin windows out. I have no meter but my ears say that was plenty. Now for that WOTW scene....

has this thread gone its limit?

Maybe I missed it but has anyone with dual subs (besides the 18in beasts) done this test?

I will be getting dual HSU HO's at the end of the month, if the thread is still going then I will give my numbers. Same thing with the WOTW thread. :D

SWEET Kevin....can't wait to see those impressive numbers!!!

I never ran this test with the new subs yet, the numbers I posted are with my SVS. I will have to throw nemo back in.

Kingrsl,

My test was with dual subs.

1. 105db from Listening Position (Digital SPL Meter--Max)
2. 117db from 1 meter (Digital SPL Meter--Max)
3. 2000 ft^3 (not sealed-open to rest of downstairs townhouse {4000ft^3})
4. A single PB10-ISD
5. Master Volume -0db, Sub Volume -6db, Sub calibrated to 85db on SPL meter (uncorrected)

Edit: Sub Volume was -6 db, not -0 db during test.

Was finally able to test this scene (borrowed a copy from my parents).

1. 110dB @ LP
2. n/a
3. 4,800 ft3
4. HSU VTF3 MK3, no turbo, 18Hz tuning
5. Master volume @ -7dB

-GL

Art needs to join in this !(hint)

Kinda hard to do 1m when you have four subwoofers... :D

His website needs updating too; still says four PB-12+/2 subs.

BUMP....i'd like to see some PC-ULTRA owners run this test...

For doing these tests, how do you turn off your mains?

I have a denon 2807 and it would seem I can only turn off sub center and surrounds.

Do you guys actually unwire the mains for these tests?

For doing these tests, how do you turn off your mains?

I have a denon 2807 and it would seem I can only turn off sub center and surrounds.

Do you guys actually unwire the mains for these tests?

My Pioneer has a button that says 'Speakers' and it toggles them being on or off.

For doing these tests, how do you turn off your mains?

I have a denon 2807 and it would seem I can only turn off sub center and surrounds.

Do you guys actually unwire the mains for these tests?

That does not surprise me. My Denon also has no way to turn off the front left and right channels. Disconnection is the only way to do that. Boo to Denon for overlooking such a simple thing.

they should have a button on the remote that says "darla test" that turns all the speakers off except for the sub

:D

That does not surprise me. My Denon also has no way to turn off the front left and right channels. Disconnection is the only way to do that. Boo to Denon for overlooking such a simple thing.

Ok, I thought I was going nuts looking for a button or something in the menu but couldn't find anything...


Does it really matter if the mains are on for doing this test? especially if they are only bookshelves...I'm sure the High DB's during these scenes are coming mainly from the subs.

I just replayed this again, and my son and I couldn't help but laugh.OMG. Thats all I can say. We must have replayed it a dozen times.I can just imagine how many subs crapped out during this scene!!

KG

BUMP....can we get some new readings from members who own:

SVS Ultra 13's?
Conquest
Castle
Tower
MFW15

ect...

Hey Brad,

I am building 4 18 inch sonosubs tuned to 12.9 hz. I will retest all these scenes. I bet the only ones that will get better are the lower tuned scenes, like pulse and some scenes in WOTW.

WOW....that is going to be INSANE!

MK, you are going to hurt yourself yet!

I usually watch movies with the volume set at -8, with my Galaxy CM-140 spl I got peaks of 129.7db at listening position with this scene.

Here's my PB13-Ultra's readings:

VSX-1015TX receiver
Digital SPL meter Max C weighted fast
Volume setting=-14 dB
Sub is set a 0.0 dB in receiver calibrated to 70 (uncorrected) dB
Gain=11 o'clock position
Listening Position =98dB
1m=110dB
15 Hz tune

Gawd this shakes the house man!!!!

4043 cu ft (opens into large kitchen as well)

VSX-1015TX receiver
Digital SPL meter Max C weighted fast
Volume setting=-10dB
Sub is set a 0.0 dB in receiver calibrated to 70 (uncorrected) dB
Gain=11 o'clock position
Listening Position =104dB
1m=115dB
15 Hz tune

Doing this is giving me a headache. I'll stop here. That's some serious slam!

I will try 20 Hz tune to see if I can get higher dBs tomorrow.

VSX-1015TX receiver
Digital SPL meter Max C weighted fast
Volume setting=-10dB
Sub is set a 0.0 dB in receiver calibrated to 70 (uncorrected) dB
Gain=11 o'clock position
Listening Position =104dB
1m=115dB
15 Hz tune

Doing this is giving me a headache. I'll stop here. That's some serious slam!

I will try 20 Hz tune to see if I can get higher dBs tomorrow.

HOLY COW....my room is HALF that volume.....

I wonder what a PB-13 would sound like in my space!

HOLY COW....my room is HALF that volume.....

I wonder what a PB-13 would sound like in my space!

Put it this way, for the second set of readings I was in front of the sub behind the SPL meter and I could feel the wind blowing (the sub pushes some serious air)!

I felt like I was getting seriously pounded.:eek:

Well my listening position is about 3-4 feet away from the sub. I sit on the couch and the sub is in the corner right next to the couch.

I wonder if I could push 115db from my LP with a single corner loaded Ultra...

Oh boy...

Well my listening position is about 3-4 feet away from the sub. I sit on the couch and the sub is in the corner right next to the couch.

I wonder if I could push 115db from my LP with a single corner loaded Ultra...

Oh boy...

Yes, you could.

I wonder if I could push 115db from my LP with a single corner loaded Ultra...

Oh boy...

Without a doubt.

At 3 -4 feet away in a smallish room, 120+ is very do-able.

Be careful guys. At my last subwoofer meet we were pushing 128db @LP on Pulse and I could feel my ears getting "plugged" like being up at 30,000'. Bass SPL can be deceptive and can still hurt your ears.

Be careful guys. At my last subwoofer meet we were pushing 128db @LP on Pulse and I could feel my ears getting "plugged" like being up at 30,000'. Bass SPL can be deceptive and can still hurt your ears.


Reading through these insane posts I can only determine that the majority of you guys probably sufferd already some ear-damage over the years :D
That probably the reason why you play so loud ?

I play movies through my Onkyo 875 and DefTech ProMonitors just at about -15dB before I feel that its not relaxed anymore...
This beeing in 8000+ cubic feet space altough the "listening corner" in this large space is about 5meters x 4.5meters x 2.5meters.
I'm slight more then 10 feet away from my DefTechs and 8 feet from the PB13
My large living room is not acoustically treathed in any way so quite "reflective"

I have 1 x PB13 and I cannot imagine ever needing more then one...

Reading through these insane posts I can only determine that the majority of you guys probably sufferd already some ear-damage over the years :D
That probably the reason why you play so loud ?

I play movies through my Onkyo 875 and DefTech ProMonitors just at about -15dB before I feel that its not relaxed anymore...
This beeing in 8000+ cubic feet space altough the "listening corner" in this large space is about 5meters x 4.5meters x 2.5meters.
I'm slight more then 10 feet away from my DefTechs and 8 feet from the PB13
My large living room is not acoustically treathed in any way so quite "reflective"

I have 1 x PB13 and I cannot imagine ever needing more then one...


I think you are sort of missing the point here. These are brief "tests". Not normal listening. It is to see what the sub can do.

Mojomike,
I run these test to see what the subs can do, I usually calibrate flat to hit reference levels. My bass peaks are usually between 120-122 db's. When I build the sonosubs I will also sell the subs I already have, not add to them. During WOTW I hit 126 db's one time and it plugged my ears, so I know this is the limit, besides my SPL can't read higher than that. I want headroom and little distortion.

MK, basically I was just kidding with you. I wasn't aware, though, that you were going to get rid of your horns.

I just don't have the horns running right now, I also have 2 dual 18's as well. I moved the subs behind the screen and actually needed more to reach reference levels. (that location is much harder to pressurize the room and it is 3x times farther away). I will be selling all of them. They have served me well, I could not believe how well for pro audio subs. 120 db's at 20 hz. But then they dropped off to 112 db's at 15 hz and 100 db's at 5 hz. I am building the sono's to bring the 11-20 hz up to 125 db's so I know at 120 db's(reference levels when all speakers are summed into the lfe) has headroom.

Your name should be "MK I have the Theater you all wish you had".

If I only had the $$$$

Your name should be "MK I have the Theater you all wish you had".

If I only had the $$$$

LOL...

P.S


bgillycu, your " CLICK ON ME---Help me upgrade to Blu Ray" link in your sig doesnt work right.

LOL...

P.S


bgillycu, your " CLICK ON ME---Help me upgrade to Blu Ray" link in your sig doesnt work right.


Thanks for the heads up...i'll fix it tonight!

BUMP....i'd like to see some PC-ULTRA owners run this test...

I'll let you know as I just got the DVD yesterday. Should be an interesting test since I have a very large room (see signature, PC-Ultra is where the Sunfire used to be). I should be testing it sometime today.

I really need to update that page since just about everything has changed.

DirecTV H20
JVC S-VHS
Toshiba XA2
Denon AVR3808CI
SVS PC-Ultra 13

Ok... holy crap that's intense!

SVS PC-Ultra13
Denon 3808CI receiver
Digital SPL meter Max C weighted fast
Volume setting=-6dB
Sub is set a +2.0 dB in receiver after aud cal, Gain=11 o'clock position
Listening Position = 110dB
1m = 115dB
20 Hz tune

I think there is more available from the sub, but my sliding glass doors were visibly flexing :eek:

Ok... holy crap that's intense!

SVS PC-Ultra13
Denon 3808CI receiver
Digital SPL meter Max C weighted fast
Volume setting=-6dB
Sub is set a +2.0 dB in receiver after aud cal, Gain=11 o'clock position
Listening Position = 110dB
1m = 115dB
20 Hz tune

I think there is more available from the sub, but my sliding glass doors were visibly flexing :eek:


Looks comparable to my PB13-Ultra. There was definitely more power available in my system, but dang is that loud...

How far are you from your sub at listening postion?

Looks comparable to my PB13-Ultra. There was definitely more power available in my system, but dang is that loud...

How far are you from your sub at listening postion?

About 15 feet.

Hey guys .... I'm new to the sub scene with the purchase of the HSU VFT-2MK3 sub. Love this sub!!! I have a question on Master Volume readings. My Yamaha goes from 0 high to -99dB low. I have my sub calibrated to 75dB @ -50dB on my receiver. When you talk about going to -5 dB on MV is that the same as myself turning the volume up to -5dB (almost full volume). I barely turn mine to -40dB . Thats very loud. Thanks

They mean -5 relative to their reference. So if your receiver is calibrated for -50, then -55 would be "-5". I'm not sure you're calibrating correctly since you then say you turn it to -40. That would mean you listen 10db above reference. Calibrating means to use avia/dve and set the master volume so their signal reads 75db on an SPL meter.

They mean -5 relative to their reference. So if your receiver is calibrated for -50, then -55 would be "-5". I'm not sure you're calibrating correctly since you then say you turn it to -40. That would mean you listen 10db above reference. Calibrating means to use avia/dve and set the master volume so their signal reads 75db on an SPL meter.

Wouldn't my reference be -50dB on my volume reading, that's where I achieve 75dB for my speakers and sub. I still am confused. So if I go from -50dB to -40 dB on my master volume thats a 10 dB increase. So when people are reporting their readings at -15dB, -10dB,-5dB that would also be mine if I turned up the volume from my -50 dB volume level all the way up to say -10db on my Yamaha receiver. I did calibrate my sub using a SPL meter.

If -50 is your reference point then -5 would be -55, -10 would be -60, and so on. My reference is -5 so a -5 listening session is -10 for me. Reference is usually your highest point then work down from their. Reference is usually 75 db's using test tones.

Ok... holy crap that's intense!

SVS PC-Ultra13
Denon 3808CI receiver
Digital SPL meter Max C weighted fast
Volume setting=-6dB
Sub is set a +2.0 dB in receiver after aud cal, Gain=11 o'clock position
Listening Position = 110dB
1m = 115dB
20 Hz tune

I think there is more available from the sub, but my sliding glass doors were visibly flexing :eek:



So 110db from a LP 15feet away....pretty good!! Just how many Cubic Feet is your listening enviornment?

MY HT is about 1800cu ft....with 2 openings that are cover by thick velvet curtains...the space behind them is not that large at all...

Any my LP is only about 4-5 feet away....so that would probably be a 2-3db gain just from a location standpoint vs your testing at 15 feet away!

So 110db from a LP 15feet away....pretty good!! Just how many Cubic Feet is your listening enviornment?

MY HT is about 1800cu ft....with 2 openings that are cover by thick velvet curtains...the space behind them is not that large at all...

Any my LP is only about 4-5 feet away....so that would probably be a 2-3db gain just from a location standpoint vs your testing at 15 feet away!

Huge. Look at my signature link. To the left is open to the kitchen. To the rear is open to the formal living area (there is just a partition to seperate the rooms. Plus the ceilings are vaulted up to about 20'.