PULSE--Subwoofer Test - AVS Forum
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post #1 of 254 Old 03-15-2007, 04:03 PM - Thread Starter
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Be sure to read this because I changed some things!!!!

First, you need PULSE and I'll warn you the scene you are about to test is very powerful and a constant 16-18hz signal. You'll notice the PINK LINE right under 20hz....that is POWERFUL!!!




Second...the entire scene is from the 1:12:40 timestamp until about 1:13:20, but you should get your best reading within the first 10-15 seconds of the "Pulse"


THRID----PLEASE KNOW THIS IS A DEMANDING TRACK so proceed at your own risk!!!

____________________________________________________________

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) from Listening Position...Just post exactly what the SPL shows
2. db from 1 meter away
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

BGILLYJCU----Using 16hz tune and main speakers OFF
1. 99db LP
2. 102db 1meter
3. 2300cuft (not sealed due to open doorway)
4. A single SVS 16-46Plus (16hz tune)
5. Master Volume -12db Sub calibrated to 72db on SPL meter (uncorrected)

1. 101dbLP
2. 107db 1meter
3. 2300cuft (not sealed due to open doorway)
4. A single SVS 16-46Plus in 16hz tune
5. Master Volume -10db Sub calibrated to 72db on SPL meter (uncorrected)

1. 103db LP
2. 109db 1meter
3. 2300cuft (not sealed due to open doorway)
4. A single SVS 16-46Plus in 16hz tune
5. Master Volume -8db Sub calibrated to 72db on SPL meter (uncorrected)

1. 105db LP
2. 110db 1meter
3. 2300cuft (not sealed due to open doorway)
4. A single SVS 16-46Plus in 16hz tune
5. Master Volume -6db Sub calibrated to 72db on SPL meter (uncorrected)

1. 106db from LP
2. 111db 1meter
3. 2300cuft (not sealed due to open doorway)
4. A single SVS 16-46Plus in 16hz tune
5. Master Volume -4db Sub calibrated to 72db on SPL meter (uncorrected)

Echomalinosis
1) 79db at LP
2) N/A
3) 880 CF Sealed
4) HSU VTF2-MK3 18hz MX Using 18hz tune, one port plugged
5) Volume 65 of 99, Calibrated to 77db at Master of 75 SPL Meter Not Corrected


1) 96db At Lp
2) N/A
3) 880 CF Sealed
4) HSU VTF2-MK3 18hz MX Using 18hz tune, one port plugged
5) Volume 70 of 99, Calibrated to 77db at Master of 75 SPL Meter Not Corrected

1) 100db At Lp
2) N/A
3) 880 CF Sealed
4) HSU VTF2-Mk3 18hz MX Using 18hz tune, one port plugged
5) Volume 75 Of 99 (Chuffing), Calibrated to 77db at Master of 75 SPL Meter Not Corrected


Mojomike
1. 109 db in Listening area, about 14 ft.
2. 122 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, Behringer EP2500 powered.
5. Pedal to the metal, baby. Wide-open throttle, mains off. If she blows, I'll get new one.


Gordon1080p
1. 107dB at LP 8ft away
2. N/A
3. 4800 ft3
4. HSU VTF-3 MK3 18Hz tuning no turbo
5. Master volume at -8dB
3

Mathesar
1. 101db LP (uncorrected)
2. N/A
3. 1500cuft (door was open to hallway)
4. A single HSU VTF-3 MK3 w/ Turbo (18hz tune) corner loaded
5. Master Volume at 39 of 75


Movies2090
1. 94db LP
2. xxx-didn't try
3. 3000cuft (not sealed)
4. A single SVS PB12-ISD
5. Master Volume -15db Sub calibrated to 77db on SPL meter (uncorrected)
I did encounter port chuffing all the way from -25mv on up. Only movie I've had that happen. Which is weird cause I can run WotW at -8MV and have no problems what so ever.


MKtheater
1. 100db from Lp
2. n/a 1meter
3. 2300cuft (sealed)
4. Dual 18 inch horn loaded subs
5. Master Volume -10db Sub calibrated to 75db on SPL meter (uncorrected)

1. 105db from LP
2. n/a 1meter
3. 2300cuft (sealed)
4. Dual 18 inch horn loaded subs
5. Master Volume -5 db Sub calibrated to 75db on SPL meter (uncorrected)

1. 110 db from LP
2. n/a 1meter
3. 2300cuft (sealed)
4. Dual 18 inch horn loaded subs
5. Master Volume 0 db Sub calibrated to 75db on SPL meter (uncorrected)

1. 115 db from LP
2. n/a 1meter
3. 2300cuft (sealed)
4. Dual 18 inch horn loaded subs
5. Master Volume +5 db Sub calibrated to 75db on SPL meter (uncorrected)


Frodaddy
1. 110dB LP about 12ft away
2. 118 1m
3. ~7000cuft total in the open floor plan; ~3600 in living/HT area, ~3400 kitchen/dining/hallaways
4. Infinite baffle with 8 Dayton IB 15's, EP1500 pushing ~1400w in 2ohm stereo, and a BFD
5. Normal calibration is subwoofer is ~+5dB compared to the mains. For this test it was ~+19dB from the mains.

EBR
1. 105db at LP
2. (didn't measure)
3. 2600cuft
4. 4 Fi Car Q18s in a custom 70cuft sealed enclosure powered by an EP2500 bridged into 4ohms
5. -10 on AVR with sub calibrated to 75db (same as mains)

1. 110db at LP
2. (didn't measure)
3. 2600cuft
4. 4 Fi Car Q18s in a custom 70cuft sealed enclosure powered by an EP2500 bridged into 4ohms
5. -5 on AVR with sub calibrated to 75db (same as mains)


PCLausen
1. 113dB @ LP
2. 122dB @ 1M (me and the meter both had to hold on!)
3. 6480cuft
4. Dual 18" TC Sound PA-5000 @ 1950W each
5./a -20dB on my Sony TA-E9000ES old school pre-amp...
5./b mid 70's sub dial-in...

LL

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post #2 of 254 Old 03-15-2007, 04:08 PM - Thread Starter
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I dared not to go futher that -4db master volume because the whole house felt like it was going to collapse and plus I didn't want to damage the woofer...

Seriously the ductwork inside the walls was shaking loud enough to be heard in the living room.....I was amazed! My favorite part too.....NOT A SINGLE PORT CHUFF out of this beast!

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post #3 of 254 Old 03-15-2007, 04:52 PM
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Was there any sound that you could hear besides your house shaking? This would be a good test for my new 17-39pci (see if the 17hz tune was worth it), don't have meter yet but it is on its way.
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post #4 of 254 Old 03-15-2007, 05:02 PM - Thread Starter
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The great thing about this scene for us subwoofer nuts is that the WHOLE SCENE is dedicated to just this PULSE sound. The 16-20hz bass is really the main portion of the scene...

This would be the perfect test to see if what you did was really worth it!!!

You can hear the pulse action and the UP and DOWN of the bass..... but the sound is really subsonic so the effect is more EARTHSHAKING than a sound that you can hear....

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post #5 of 254 Old 03-15-2007, 05:52 PM
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I finally got around to doing the War of the Worlds test and then you post this one today! LOL Time for another trip to the video store. Do you have the regular version or the HD-DVD one with TrueHD? After these threads, I'm already getting the itch for a second sub but I think for less than $500, my sub is holding it's own.
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post #6 of 254 Old 03-15-2007, 06:00 PM - Thread Starter
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All the ones I'm doing are just standard DVD.

I'll update the WOTW one.

I hope people keep doing all of these....it really gives us good numbers too look at....especially to see how close everyone pushes their sub to the compression point...

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post #7 of 254 Old 03-15-2007, 07:27 PM
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Using 18hz tune, one port plugged

1) 79db at LP
2) N/A
3) 880 CF Sealed
4) HSU VTF2-MK3 18hz MX
5) Volume 65 of 99, Calibrated to 77db at Master of 75 SPL Meter Not Corrected


1) 96db At Lp
2) N/A
3) 880 CF Sealed
4) HSU VTF2-MK3 18hz MX
5) Volume 70 of 99, Calibrated to 77db at Master of 75 SPL Meter Not Corrected

1) 100db At Lp
2) N/A
3) 880 CF Sealed
4) HSU VTF2-Mk3 18hz MX
5) Volume 75 Of 99 (Chuffing), Calibrated to 77db at Master of 75 SPL Meter Not Corrected

I think I need a different sub for this scene, should have got the VTF3-MK3
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post #8 of 254 Old 03-15-2007, 07:39 PM
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You guys really are nutz.

I'm refraining from doing these tests simply because I happen to like my PC Ultra, and have no desire to see just how hard I can push it before the magic smoke escapes.

Anyways, have fun.... carry on.


Tim

He drove a black and white pirate ship at 190 mph.
- Dale in the #3 will never be forgotten. Thanks for the memories.
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post #9 of 254 Old 03-15-2007, 08:00 PM
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Quote:
Originally Posted by Echomalinois View Post

Using 18hz tune, one port plugged

1) 79db at LP
2) N/A
3) 880 CF Sealed
4) HSU VTF2-MK3 18hz MX
5) Volume 65 of 99, Calibrated to 77db at Master of 75 SPL Meter Not Corrected


1) 96db At Lp
2) N/A
3) 880 CF Sealed
4) HSU VTF2-MK3 18hz MX
5) Volume 70 of 99, Calibrated to 77db at Master of 75 SPL Meter Not Corrected

1) 100db At Lp
2) N/A
3) 880 CF Sealed
4) HSU VTF2-Mk3 18hz MX
5) Volume 75 Of 99 (Chuffing), Calibrated to 77db at Master of 75 SPL Meter Not Corrected

I think I need a different sub for this scene, should have got the VTF3-MK3

I also have the VTF-2 MK3. It's a fantastic performing sub for the money, IMO! My room is about 3 times the size of yours though. These tests are a bit demanding but I've never listened to any movies at reference volume levels so I think the sub is plenty for me. I'll see if I can snag a copy of the movie this weekend to test.
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post #10 of 254 Old 03-16-2007, 01:28 AM
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I got my replacement Fathom 113 and i will do some tests soon... what will really be fun is when i set up my little home theater in my basement which is maybe 2500 sqft sealed...
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post #11 of 254 Old 03-16-2007, 04:43 AM - Thread Starter
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Quote:
Originally Posted by OvalNut View Post

You guys really are nutz.

I'm refraining from doing these tests simply because I happen to like my PC Ultra, and have no desire to see just how hard I can push it before the magic smoke escapes.

Anyways, have fun.... carry on.


Tim


I think you are missing the true point of the thread. It is to test these scenes with a calibrated sub, which means you are not going to be putting it to a level where you really have to worry about doing harm. Personally I tested my sub at 4 different levels of MV, but all of them were within my normal listening range except the -4dbMV test.....I only went that far because I could tell at -6db that I still had room to improved based upon what I was hearing from the sub.. It is cool if you don't do the test, but It would be nice if we could get an Ultra in the mix

Just run the test at your normal listening volume (with only the sub on) and see what numbers you get

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post #12 of 254 Old 03-16-2007, 07:42 AM
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Is this movie worth watching or just running the test? I will watch it first if need be.
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post #13 of 254 Old 03-16-2007, 07:43 AM
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How does one post pictures of their theater within this box?
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post #14 of 254 Old 03-16-2007, 07:58 AM - Thread Starter
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MK....you have to have your pictures up on some sort of website and then you can paste the URL of the picture itself using HTML code using the picture tool....

Also....the movie is decent. I'd say B- for a Horror flick but honestly it is an A to A+ for subwoofer fans. Just look at the waterfall in the first post........its unreal!

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post #15 of 254 Old 03-16-2007, 11:46 AM
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I watched it with low expectations, and found it surprisingly enjoyable. (Okay, I'm a sucker for horror flicks as long as they are not just gore fests.)

It may not be Citizen Kane, but the bass is a lot better!
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post #16 of 254 Old 03-16-2007, 06:48 PM
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Guys, I always test the drum beats from Hotel California Live from "Hell Freezes Over". Checked the FQ via M-Audio and the entry drums go down to 16hz. The subwoofer should report around 18hz to 20hz. My Titanic 15" MKIII with HPSA-1000 reported 19hz....So as long as your sub reproduces/magnifies the original, it is good.
Will you believe me if I told you the "True Sunfire" could not breath below 25hz......

Test/record the original Frequency curve using M-Audio/True-RTA and then test your sub and make sure it does not colour the sound. I have not used any drivers over $200......not sure what can they do for me.......other than help me demolish my house
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post #17 of 254 Old 03-16-2007, 09:29 PM
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Thanks for the tip,I am going to check Pulse out. Always good to add solid demo scenes to the list,to show off subs.

Ask yourself mortal , do you have as much displacement as me ? The answer is no unless you have a Windmere fan sub.
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post #18 of 254 Old 03-17-2007, 10:33 AM
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I finally got around to trying this one out.

1. 109 db in Listening area, about 14 ft.
2. 122 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, Behringer EP2500 powered.
5. Pedal to the metal, baby. Wide-open throttle, mains off. If she blows, I'll get new one.
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post #19 of 254 Old 03-18-2007, 10:19 AM - Thread Starter
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DAMN 109db....your whole freaking house had to be ready to cave in!!

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post #20 of 254 Old 03-18-2007, 10:27 AM
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I't sounds damn powerful, but the room is so open that it diminishes the effect.
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post #21 of 254 Old 03-18-2007, 10:22 PM
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1. 107dB at LP 8ft away
2. N/A
3. 4800 ft3
4. HSU VTF-3 MK3 18Hz tuning no turbo
5. Master volume at -8dB


-GL
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post #22 of 254 Old 03-18-2007, 11:23 PM
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I have this movie on HD-DVD and thought it was absolutely awful, even for a cheesey horror movie. I didn't think anything of the bass when I watched it, so I'll pop it in again one of these days.
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post #23 of 254 Old 03-19-2007, 04:59 AM - Thread Starter
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Quote:
Originally Posted by Gordon1080p View Post

1. 107dB at LP 8ft away
2. N/A
3. 4800 ft3
4. HSU VTF-3 MK3 18Hz tuning no turbo
5. Master volume at -8dB


-GL


You have such a large room, and you are not even using turbo and still pushed out 107db. Do you use bass traps or any other room treatments??

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post #24 of 254 Old 03-19-2007, 08:28 AM
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No, I don't use any sound treatments or bass traps. Bass traps would definitely help the null I have at around 34Hz but I don't want to screw up the looks of the living room. The sub is corner loaded, the ports fire into the wall 5 inches away and the speaker fires into the couch about 8 inches away. I actually lose some spl if I take the couch away and have the sub fire directly into the room. The LP is my loveseat which is perpendicular to the couch.

The SPL and SQ this sub provides me in my room is nothing short of spectacular.

GL
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post #25 of 254 Old 03-19-2007, 09:06 PM
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I'm unable to disable the mains so everything was going here. I didnt hear any port noise although they were pushing some impressive amounts of air when putting my hand near them. I have the sub's gain dial set at 10 oclock and sub level set at -4dB on the receiver.

1. 101db LP (uncorrected) Not sure how much further I could push it, i didn't hear any distortion or bottoming out at this level .. I just know my walls were shaking lol.
2. N/A
3. 1500cuft (door was open to hallway)
4. A single HSU VTF-3 MK3 w/ Turbo (18hz tune) corner loaded
5. Master Volume at 39 of 75
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post #26 of 254 Old 03-20-2007, 09:59 AM
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Quote:
Originally Posted by Mathesar View Post

I'm unable to disable the mains so everything was going here. I didnt hear any port noise although they were pushing some impressive amounts of air when putting my hand near them. I have the sub's gain dial set at 10 oclock and sub level set at -4dB on the receiver.

1. 101db LP (uncorrected) Not sure how much further I could push it, i didn't hear any distortion or bottoming out at this level .. I just know my walls were shaking lol.
2. N/A
3. 1500cuft (door was open to hallway)
4. A single HSU VTF-3 MK3 w/ Turbo (18hz tune) corner loaded
5. Master Volume at 39 of 75

Just curious. What is your crossover setting? Also which cross are you using? The subs, your HTR or both.

Ian

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post #27 of 254 Old 03-20-2007, 07:56 PM
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Quote:
Originally Posted by mailiang View Post

Just curious. What is your crossover setting? Also which cross are you using? The subs, your HTR or both.

Ian

Both, My receiver doesn't allow me to disable its crossover, so I have the reciever set at 100hz and the subwoofer's cross set to 90hz. Not sure if this is ideal but thats how its currently set...
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post #28 of 254 Old 03-20-2007, 08:17 PM
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It's not good running the signal through two crossovers. It's likely to cause gaps in the response. You should bypass the subs's crossover or turn it to the maximum frequency and just use the crossover on the receiver. Also, I don't know what your main speakers are, but unless they are very small, the receiver set at 100 seems a little high.
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post #29 of 254 Old 03-20-2007, 09:13 PM
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Quote:
Originally Posted by mojomike View Post

It's not good running the signal through two crossovers. It's likely to cause gaps in the response. You should bypass the subs's crossover or turn it to the maximum frequency and just use the crossover on the receiver.


Not necessarily. This theory assumes that most crossovers have a steep 24db slope. However most HTR crossover's use only 12db slopes. Many subs like the Velodyne VRP models don't use high pass filters (crossovers). Buy using both crossovers and staggering the settings (ie: 120/80 ) you will introduce a steeper slope and in some cases this will provide the cleanest output. Some manufactures like Velodyne mention this as an option in their owner manuels. HSU wisely uses a 24db slope, therefore, depending on your set up, if you try using the subs crossover, rather then bypassing it, you may experience less distortion and port noise.

Ian

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post #30 of 254 Old 03-23-2007, 08:33 AM - Thread Starter
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Only 5 people ran this test...


Anyone willing to contribute??

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