Official Power Sound Audio Subwoofer Thread - Page 1537 - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 61831Likes
Reply
 
Thread Tools
post #46081 of 51123 Old 12-06-2018, 11:33 AM
AVS Forum Special Member
 
imureh's Avatar
 
Join Date: Mar 2009
Location: Houston, TX
Posts: 4,360
Mentioned: 201 Post(s)
Tagged: 0 Thread(s)
Quoted: 2727 Post(s)
Liked: 3296
Quote:
Originally Posted by jpmst3 View Post
Have any of the PSA products been submitted to data-bass.com for testing?
A while back, yes

Subwoofers: Dual Rythmik FV18s Rev2 with Paper cone, BOSS Platform mini riser
Speakers: PSA MTM-210 L/C/R - Klipsch 250S Surrounds, PSA MT 110sr Rear Surrounds, 4 x SVS Prime Elevation for Atmos
Video: Epson PowerLite Home Cinema 6500 UB; Room: 2100 cuft sealed on suspended floor
Receiver & Players: Denon X4400H, Oppo UDP-203, Roku Ultra. Apple TV, Minidsp 2X4 HD
imureh is online now  
Sponsored Links
Advertisement
 
post #46082 of 51123 Old 12-06-2018, 11:35 AM
AVS Forum Special Member
 
jpmst3's Avatar
 
Join Date: Dec 2005
Location: Davidsville, PA
Posts: 8,591
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 196 Post(s)
Liked: 314
Quote:
Originally Posted by imureh View Post
A while back, yes
Oh ya, I do see a couple of their older models listed. ...Not much from the current lineup though.

______________________________________________
Joe = LFE Addict
Past Builds: 24" LMS-5400 cube, Anarchy 25Hz Tapped Horn, Danley DTS-10 kit, BFM AutoTuba, BFM THT, BFM THT-LP
Joe's LOWARHORN build, Dual LMS-5400 Ultra Endtables build

Last edited by jpmst3; 12-06-2018 at 11:38 AM.
jpmst3 is offline  
post #46083 of 51123 Old 12-06-2018, 12:00 PM
AVS Forum Special Member
 
imureh's Avatar
 
Join Date: Mar 2009
Location: Houston, TX
Posts: 4,360
Mentioned: 201 Post(s)
Tagged: 0 Thread(s)
Quoted: 2727 Post(s)
Liked: 3296
Quote:
Originally Posted by jpmst3 View Post
Oh ya, I do see a couple of their older models listed. ...Not much from the current lineup though.
Yep, its been brought up many times...at the moment PSA does not see a reason to do so and they have a right to do so plus there are some others that do not send in theirs as well.

Subwoofers: Dual Rythmik FV18s Rev2 with Paper cone, BOSS Platform mini riser
Speakers: PSA MTM-210 L/C/R - Klipsch 250S Surrounds, PSA MT 110sr Rear Surrounds, 4 x SVS Prime Elevation for Atmos
Video: Epson PowerLite Home Cinema 6500 UB; Room: 2100 cuft sealed on suspended floor
Receiver & Players: Denon X4400H, Oppo UDP-203, Roku Ultra. Apple TV, Minidsp 2X4 HD

Last edited by imureh; 12-06-2018 at 12:05 PM.
imureh is online now  
Sponsored Links
Advertisement
 
post #46084 of 51123 Old 12-06-2018, 12:01 PM
AVS Forum Addicted Member
 
basshead81's Avatar
 
Join Date: Mar 2013
Location: Fort Wayne, IN
Posts: 13,126
Mentioned: 183 Post(s)
Tagged: 0 Thread(s)
Quoted: 318 Post(s)
Liked: 8961
Only 2 companies currently sending their stuff to Data-bass is Rythmik and JTR.
basshead81 is offline  
post #46085 of 51123 Old 12-06-2018, 12:03 PM
AVS Forum Special Member
 
jpmst3's Avatar
 
Join Date: Dec 2005
Location: Davidsville, PA
Posts: 8,591
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 196 Post(s)
Liked: 314
Quote:
Originally Posted by imureh View Post
Yep, its been brought up many times...at the moment PSA does not see a reason to do so and they have a right to do so plus there are some others that do send in theirs as well.
Quote:
Originally Posted by basshead81 View Post
Only 2 companies currently sending their stuff to Data-bass is Rythmik and JTR.
Understood. Thanks for the info.

I see both sides of the argument there.

______________________________________________
Joe = LFE Addict
Past Builds: 24" LMS-5400 cube, Anarchy 25Hz Tapped Horn, Danley DTS-10 kit, BFM AutoTuba, BFM THT, BFM THT-LP
Joe's LOWARHORN build, Dual LMS-5400 Ultra Endtables build

Last edited by jpmst3; 12-06-2018 at 12:10 PM.
jpmst3 is offline  
post #46086 of 51123 Old 12-06-2018, 12:34 PM
AVS Forum Special Member
 
Join Date: Nov 2016
Posts: 1,018
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 890 Post(s)
Liked: 913
Quote:
Originally Posted by chucky7 View Post
So if you change the gain to 0dB gain, your mic's headroom will be higher.

I never paid much attention to the UMIK-1 headroom numbers. I just take the measurements. Since the sub is 14 ft from my MLP, the sub's limit is reached before the UMIK-1's limit is.

Yes on finding the limits. Many people run the FR. Not many run the compression sweeps. Of course CS is not for REW beginners.
I agree the compression sweeps are not for REW beginners. I did it in increments of 3db from mv -21 on down.

I wish I had done the umik gain sensitivity change before you came last weekend, I would've definitely made more of an effort to get the cap 1400 out of your car lol.
chucky7 likes this.
GeoJustGeo is offline  
post #46087 of 51123 Old 12-06-2018, 12:50 PM
AVS Forum Special Member
 
chucky7's Avatar
 
Join Date: Apr 2002
Location: Rancho Cucamonga, CA
Posts: 4,545
Mentioned: 293 Post(s)
Tagged: 0 Thread(s)
Quoted: 3473 Post(s)
Liked: 4362
Quote:
Originally Posted by GeoJustGeo View Post
I agree the compression sweeps are not for REW beginners. I did it in increments of 3db from mv -21 on down.

I wish I had done the umik gain sensitivity change before you came last weekend, I would've definitely made more of an effort to get the cap 1400 out of your car lol.
Typically, you start at 85dB or so (40dB above noise floor) with increments of 5dB. Then when you are at 105dB or so (again depending on if you have seen compressions yet), switch to increments of 3dB.

In hindsight, I should have brought my UMIK-1 and the speaker stands (which I have no use for now) last weekend. It's too bad we simply ran out of time.

In the grand scheme of things, you don't really NEED a Cap 1400. It would have been nice if we were able to compare them though.

BTW, I am not so sure that you have your bass 15dB hot...
GeoJustGeo likes this.

Speakers: L/C/R: JTR Noesis 212HT. Surrounds: Jamo C103, KEF Q100, Polk Audio RTiA3.
Subwoofer: JTR Captivator 4000ULF.
AVR: Denon AVR-X4400H. TV: Samsung UN75NU8000FXZA.

FS: Jamo C103, KEF Q100 and Polk RTiA3

Last edited by chucky7; 12-06-2018 at 02:49 PM.
chucky7 is online now  
post #46088 of 51123 Old 12-06-2018, 01:45 PM
Senior Member
 
kelly.mcaloney's Avatar
 
Join Date: May 2015
Posts: 349
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 225 Post(s)
Liked: 277
Quote:
Originally Posted by GeoJustGeo View Post
I agree the compression sweeps are not for REW beginners. I did it in increments of 3db from mv -21 on down.



I wish I had done the umik gain sensitivity change before you came last weekend, I would've definitely made more of an effort to get the cap 1400 out of your car lol.


What subs did u have again???


Sent from my iPhone using Tapatalk
GeoJustGeo likes this.
kelly.mcaloney is offline  
post #46089 of 51123 Old 12-06-2018, 02:23 PM
AVS Forum Special Member
 
jamiebosco's Avatar
 
Join Date: Aug 2007
Location: Australia
Posts: 1,153
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 699 Post(s)
Liked: 1659
Quote:
Originally Posted by kelly.mcaloney View Post
What subs did u have again???


Sent from my iPhone using Tapatalk
Geo has (or had?) a V1801 and an XTZ 3x12
kelly.mcaloney and GeoJustGeo like this.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TV: Panasonic P65ST60 AVR: Denon 4311ci Speakers: PSA MTM-210C (Centre), PSA MTM-210 (Left & Right), PSA MT-110 (Surrounds) Subwoofers: Dual Seaton SubMersives
jamiebosco is online now  
post #46090 of 51123 Old 12-06-2018, 03:29 PM
AVS Forum Special Member
 
Join Date: Nov 2016
Posts: 1,018
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 890 Post(s)
Liked: 913
Quote:
Originally Posted by chucky7 View Post
Typically, you start at 85dB or so (40dB above noise floor) with increments of 5dB. Then when you are at 105dB or so (again depending on if you have seen compressions yet), switch to increments of 3dB.

In hindsight, I should have brought my UMIK-1 and the speaker stands (which I have no use for now) last weekend. It's too bad we simply ran out of time.

In the grand scheme of things, you don't really NEED a Cap 1400. It would have been nice if we were able to compare them though.

BTW, I am not so sure that you have your bass 15dB hot...
I tried doing the CS a long time ago but was held back due to the Mic running out of headroom so I already had an idea of where I was at.

The stands woulda been very helpful but oh well it's all good. As for the cap 1400, it would've helped to approach the lower frequencies while adding headroom to the overall setup. As for the "need" for it, not sure, maybe? lol. But finding the limits to my setup this morning has def been an eye opener. I need to reevaluate my thinking and goals with this new found information.

I only did testing this morning, haven't actually made adjustments or watched any content yet to really see what it's like or where I'm at. I'll be all over that tonight!

But before I make any changes I'll try to see how hot i was running my subs when you listened to them.
chucky7 likes this.
GeoJustGeo is offline  
post #46091 of 51123 Old 12-06-2018, 03:30 PM
AVS Forum Special Member
 
Join Date: Nov 2016
Posts: 1,018
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 890 Post(s)
Liked: 913
Quote:
Originally Posted by jamiebosco View Post
Geo has (or had?) a V1801 and an XTZ 3x12
Yup still have both
jamiebosco and CallingMrBenzo like this.
GeoJustGeo is offline  
post #46092 of 51123 Old 12-06-2018, 06:27 PM
AVS Forum Special Member
 
jamiebosco's Avatar
 
Join Date: Aug 2007
Location: Australia
Posts: 1,153
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 699 Post(s)
Liked: 1659
Quote:
Originally Posted by GeoJustGeo View Post
Yup still have both
I thought you may have also acquired Chucky's 1400 (it's a bargain!)
has the potential to work very well with the 3x12
Pradeep2 and GeoJustGeo like this.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TV: Panasonic P65ST60 AVR: Denon 4311ci Speakers: PSA MTM-210C (Centre), PSA MTM-210 (Left & Right), PSA MT-110 (Surrounds) Subwoofers: Dual Seaton SubMersives
jamiebosco is online now  
post #46093 of 51123 Old 12-06-2018, 08:33 PM
AVS Forum Special Member
 
Join Date: Nov 2016
Posts: 1,018
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 890 Post(s)
Liked: 913
Quote:
Originally Posted by jamiebosco View Post
I thought you may have also acquired Chucky's 1400 (it's a bargain!)
has the potential to work very well with the 3x12
Believe me, I almost did it! I was very close but like I told Chucky, even tho it was a steal, it wouldn't have been in the best interest of my future setup. Something that's important to me is having duals of the same. I don't have that right now and I hate it!!! Getting that sub from him would've only made matters worse, even tho it would've made my bass better lol.

I have other goals in mind and I need to stay focused. I'll tell you what tho it was very hard to resist!
I even almost got it for my roommate lol.

Chucky says I don't "need" it, but it would've been fun lol.
GeoJustGeo is offline  
post #46094 of 51123 Old 12-06-2018, 08:44 PM
AVS Forum Special Member
 
Join Date: Nov 2016
Posts: 1,018
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 890 Post(s)
Liked: 913
Which would you guys say is the safest before compression? I would choose blue (-6), am I correct in thinking that?
Attached Thumbnails
Click image for larger version

Name:	v18 comp sweeps_1544157843783.jpg
Views:	43
Size:	214.8 KB
ID:	2492954  
GeoJustGeo is offline  
post #46095 of 51123 Old 12-06-2018, 10:26 PM
AVS Forum Special Member
 
chucky7's Avatar
 
Join Date: Apr 2002
Location: Rancho Cucamonga, CA
Posts: 4,545
Mentioned: 293 Post(s)
Tagged: 0 Thread(s)
Quoted: 3473 Post(s)
Liked: 4362
Quote:
Originally Posted by GeoJustGeo View Post
Which would you guys say is the safest before compression? I would choose blue (-6), am I correct in thinking that?
I see slight compression at 17~18Hz in the brown graph. I would do at least a couple more though.

Speakers: L/C/R: JTR Noesis 212HT. Surrounds: Jamo C103, KEF Q100, Polk Audio RTiA3.
Subwoofer: JTR Captivator 4000ULF.
AVR: Denon AVR-X4400H. TV: Samsung UN75NU8000FXZA.

FS: Jamo C103, KEF Q100 and Polk RTiA3
chucky7 is online now  
post #46096 of 51123 Old 12-07-2018, 12:03 AM
AVS Forum Special Member
 
Join Date: Nov 2016
Posts: 1,018
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 890 Post(s)
Liked: 913
Quote:
Originally Posted by chucky7 View Post
I see slight compression at 17~18Hz in the brown graph. I would do at least a couple more though.
Really? They're in increments of 3db. I wouldn't have thought to keep going...
GeoJustGeo is offline  
post #46097 of 51123 Old 12-07-2018, 01:31 AM
AVS Forum Special Member
 
chucky7's Avatar
 
Join Date: Apr 2002
Location: Rancho Cucamonga, CA
Posts: 4,545
Mentioned: 293 Post(s)
Tagged: 0 Thread(s)
Quoted: 3473 Post(s)
Liked: 4362
Quote:
Originally Posted by GeoJustGeo View Post
Really? They're in increments of 3db. I wouldn't have thought to keep going...
Take this CS for example,



I started from the red graph with 5dB increments. When I ran the light blue graph, there was slight compression below 20Hz. Going up another 5dB and ran the dark blue graph, the compression was 2dB below 20Hz. Then I switched to 3dB increments and ran the pink graph. Now, the compression was 1.5dB below 20Hz. Finally I increased another 3dB and ran the black graph, showing compression of 1.5~2dB from 15~20Hz.

Since I run length of 256k measurements, the compression sweeps are short and much less demanding than for example, playing Bass Mekanik - Suck My Bass (Lo & Slo Remix) at spirited levels.
GeoJustGeo likes this.

Speakers: L/C/R: JTR Noesis 212HT. Surrounds: Jamo C103, KEF Q100, Polk Audio RTiA3.
Subwoofer: JTR Captivator 4000ULF.
AVR: Denon AVR-X4400H. TV: Samsung UN75NU8000FXZA.

FS: Jamo C103, KEF Q100 and Polk RTiA3

Last edited by chucky7; 12-07-2018 at 01:37 AM.
chucky7 is online now  
post #46098 of 51123 Old 12-07-2018, 08:47 AM
AVS Forum Special Member
 
Join Date: Nov 2016
Posts: 1,018
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 890 Post(s)
Liked: 913
Ok I guess my question is how much compression is too much compression? I thought the minute it showed up you were done and just default to the last sweep prior as a safe max zone for your sub's limit.

Is there a compression sweep guide lol?
GeoJustGeo is offline  
post #46099 of 51123 Old 12-07-2018, 09:18 AM
AVS ***** Member
 
mthomas47's Avatar
 
Join Date: Nov 2007
Posts: 8,187
Mentioned: 331 Post(s)
Tagged: 0 Thread(s)
Quoted: 5424 Post(s)
Liked: 10208
Quote:
Originally Posted by GeoJustGeo View Post
Ok I guess my question is how much compression is too much compression? I thought the minute it showed up you were done and just default to the last sweep prior as a safe max zone for your sub's limit.

Is there a compression sweep guide lol?

Hi,

That's a good question! I think that different people would define maximum safe limits in different ways. Personally, I would prefer to run my subwoofers as cleanly as possible, with sufficient headroom so that I had no compression at all. As a practical matter, I'm not sure that having a little bit of compression would be harmful to your subwoofers. It might, however, slightly affect your audio quality, depending on how noticeable it was. Remember that when the bass compresses, some frequencies continue to play louder, while other frequencies don't. The compression is rarely entirely symmetrical.

Nathan Funk, of Funk Audio, has stated that compression above about 50 or 60Hz is much more noticeable than compression below 30Hz, or especially below 20Hz. In his experience, some people are able to detect even 1 or 2db of compression at, let's say 60Hz, where even 3db at 20Hz or below might not be as noticeable. I think that individuals would have to experiment to find out where compression became noticeable to them, and the crossovers they used might be a factor in that.

Speaking personally again, and using Chucky's example, I might prefer not to go above the light blue line at 107.3db, and almost certainly not above the dark blue line at 110.1db, due to the compression occurring above 50Hz. Combined with the strong peak at ~42Hz, I think that the fact that the mid-bass frequencies stopped getting much louder might be especially noticeable to me with some content. But, I think that depends a lot on our own listening habits and experiences. Once we get used to a fairly smooth frequency response, we may want to add a house curve to lift the lowest frequencies, or to add some PEQ at specific mid-bass frequencies. But, it can be harder to go back to hearing randomly peaky bass, however it occurs.

If I were trying to advise someone else, my default advice would always be to have enough subwoofer headroom to avoid distortion, compression, or port chuffing. But, the reality is that we all enjoy slightly different aspects of our listening experiences, and how much compression is acceptable to someone is just one of many YMMV questions.

Regards,
Mike

GUIDE TO SUBWOOFER CALIBRATION AND BASS PREFERENCES

* The Guide linked above is a comprehensive guide to Audio & HT systems, including:
Speaker placements & Room treatments; HT calibration & Room EQ; Room gain; Bass
Preferences; Subwoofer Buyer's Guide: Sealed/ported; ID subs; Subwoofer placement.

Last edited by mthomas47; 12-07-2018 at 09:21 AM.
mthomas47 is offline  
post #46100 of 51123 Old 12-07-2018, 09:32 AM
AVS Forum Special Member
 
chucky7's Avatar
 
Join Date: Apr 2002
Location: Rancho Cucamonga, CA
Posts: 4,545
Mentioned: 293 Post(s)
Tagged: 0 Thread(s)
Quoted: 3473 Post(s)
Liked: 4362
Quote:
Originally Posted by GeoJustGeo View Post
Ok I guess my question is how much compression is too much compression? I thought the minute it showed up you were done and just default to the last sweep prior as a safe max zone for your sub's limit.

Is there a compression sweep guide lol?
You are referring to clean output without compression. However, if you stop at the first sign of compression, then you will never find out the limit of your sub... Take my CS for example, if I had stopped at the first sign of compression (light blue), then I would never know that I still have 12dB of headroom from 27Hz to 45Hz.

When you increase your MV further, you will see that the newest FR 'overlaps' in certain frequencies with the FR 3dB lower. Personally, I will stop when the overlap spans across more than 2 measure points (ie, 16Hz and 20Hz).
GeoJustGeo likes this.

Speakers: L/C/R: JTR Noesis 212HT. Surrounds: Jamo C103, KEF Q100, Polk Audio RTiA3.
Subwoofer: JTR Captivator 4000ULF.
AVR: Denon AVR-X4400H. TV: Samsung UN75NU8000FXZA.

FS: Jamo C103, KEF Q100 and Polk RTiA3

Last edited by chucky7; 12-07-2018 at 09:44 AM.
chucky7 is online now  
post #46101 of 51123 Old 12-07-2018, 12:30 PM
AVS Forum Special Member
 
Join Date: Nov 2016
Posts: 1,018
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 890 Post(s)
Liked: 913
Mike, thank you for your perspective. It seems all this is why they say to get duals or more. I imagine it would take about 4 subs to reach bass bliss....clean, loud, undistorted, flat response with a tailored house curve, no port noise....just bass! I know it can be done with 2, but more make the job easier.

So there's one thing I've tried to avoid asking because I thought I could figure it out on my own, but after almost a year I finally give up! What does YMMV stand for?? I'm sure some of you are laughing but I really have tried lol!
mthomas47 and Haiej like this.
GeoJustGeo is offline  
post #46102 of 51123 Old 12-07-2018, 12:36 PM
AVS Forum Special Member
 
Join Date: Nov 2016
Posts: 1,018
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 890 Post(s)
Liked: 913
Quote:
Originally Posted by chucky7 View Post
if you stop at the first sign of compression, then you will never find out the limit of your sub... Take my CS for example, if I had stopped at the first sign of compression (light blue), then I would never know that I still have 12dB of headroom from 27Hz to 45Hz.
So with you knowing that information, and say that was the sub you were currently using, how would you use that info to your benefit? You having 12db more HR from 27-45hz is what I mean.
GeoJustGeo is offline  
post #46103 of 51123 Old 12-07-2018, 12:37 PM
AVS Forum Special Member
 
David Charles's Avatar
 
Join Date: Jan 2017
Location: Amherst, Ohio
Posts: 1,288
Mentioned: 55 Post(s)
Tagged: 0 Thread(s)
Quoted: 1104 Post(s)
Liked: 1846
Quote:
Originally Posted by GeoJustGeo View Post
So with you knowing that information, and say that was the sub you were currently using, how would you use that info to your benefit? You having 12db more HR from 27-45hz is what I mean.


Ymmv Your mileage may vary


Sent from my iPhone using Tapatalk
mthomas47 and GeoJustGeo like this.
David Charles is offline  
post #46104 of 51123 Old 12-07-2018, 01:50 PM
AVS Forum Special Member
 
chucky7's Avatar
 
Join Date: Apr 2002
Location: Rancho Cucamonga, CA
Posts: 4,545
Mentioned: 293 Post(s)
Tagged: 0 Thread(s)
Quoted: 3473 Post(s)
Liked: 4362
Quote:
Originally Posted by GeoJustGeo View Post
So with you knowing that information, and say that was the sub you were currently using, how would you use that info to your benefit? You having 12db more HR from 27-45hz is what I mean.
Well, when I measured the Cap 1400, I had the gain and the LF Adjust at 12 o'clock. At this particular session, I started measuring at -40dB. The light blue graph was at -15dB. When I watched movies with that sub, I always turn the LF Adjust to the max which adds 6dB on the low end. This means if I thought -15dB was the limit, then I shouldn't be watching movies with MV higher than -21dB. Knowing the headroom helps the user not exceed the limit and potentially ruin the sub.

Speakers: L/C/R: JTR Noesis 212HT. Surrounds: Jamo C103, KEF Q100, Polk Audio RTiA3.
Subwoofer: JTR Captivator 4000ULF.
AVR: Denon AVR-X4400H. TV: Samsung UN75NU8000FXZA.

FS: Jamo C103, KEF Q100 and Polk RTiA3
chucky7 is online now  
post #46105 of 51123 Old 12-07-2018, 02:53 PM
AVS Forum Addicted Member
 
Alan P's Avatar
 
Join Date: Jan 2003
Location: South Dakota
Posts: 11,521
Mentioned: 104 Post(s)
Tagged: 0 Thread(s)
Quoted: 6222 Post(s)
Liked: 5517
Quote:
Originally Posted by GeoJustGeo View Post
So there's one thing I've tried to avoid asking because I thought I could figure it out on my own, but after almost a year I finally give up! What does YMMV stand for?? I'm sure some of you are laughing but I really have tried lol!

http://lmgtfy.com/?q=ymmv


Couldn't resist.
GeoJustGeo likes this.
Alan P is offline  
post #46106 of 51123 Old 12-07-2018, 03:10 PM
AVS Forum Addicted Member
 
Alan P's Avatar
 
Join Date: Jan 2003
Location: South Dakota
Posts: 11,521
Mentioned: 104 Post(s)
Tagged: 0 Thread(s)
Quoted: 6222 Post(s)
Liked: 5517
I was just thinking that I haven't seen Jeffery ( @ahblaza ) post in a long time, so I checked. October 16th was his last post.

Has anyone heard from him? I hope all is well....
Alan P is offline  
post #46107 of 51123 Old 12-07-2018, 03:16 PM
AVS Forum Special Member
 
David Charles's Avatar
 
Join Date: Jan 2017
Location: Amherst, Ohio
Posts: 1,288
Mentioned: 55 Post(s)
Tagged: 0 Thread(s)
Quoted: 1104 Post(s)
Liked: 1846
When the house is empty, sometimes you got to just let it rip!!


Sent from my iPhone using Tapatalk
David Charles is offline  
post #46108 of 51123 Old 12-07-2018, 03:27 PM
AVS Forum Addicted Member
 
basshead81's Avatar
 
Join Date: Mar 2013
Location: Fort Wayne, IN
Posts: 13,126
Mentioned: 183 Post(s)
Tagged: 0 Thread(s)
Quoted: 318 Post(s)
Liked: 8961
Quote:
Originally Posted by GeoJustGeo View Post
Ok I guess my question is how much compression is too much compression? I thought the minute it showed up you were done and just default to the last sweep prior as a safe max zone for your sub's limit.

Is there a compression sweep guide lol?
Too much compression is when the system quits increasing in output. It's ok to have a little compression meaning that the signal still increases but not at the full amount you raised the level. For example, your turned the volume up 5db but there are spots down low where the signal only increased 3db. That is fine, but when you increase another 3db and there are spots in the signal that are touching the previous sweep, it's time to throw in the towel and back it down a notch.
chucky7, Mike Butny and GeoJustGeo like this.
basshead81 is offline  
post #46109 of 51123 Old 12-07-2018, 03:49 PM
AVS Forum Special Member
 
Join Date: Aug 2016
Posts: 1,674
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 1012 Post(s)
Liked: 1261
Quote:
Originally Posted by chucky7 View Post
Well, when I measured the Cap 1400, I had the gain and the LF Adjust at 12 o'clock. At this particular session, I started measuring at -40dB. The light blue graph was at -15dB. When I watched movies with that sub, I always turn the LF Adjust to the max which adds 6dB on the low end. This means if I thought -15dB was the limit, then I shouldn't be watching movies with MV higher than -21dB. Knowing the headroom helps the user not exceed the limit and potentially ruin the sub.
I'm pretty sure all the ID sub manufacturers have driver protection programmed into the amps. Otherwise they would be getting a lot of returns from those who melted down their drivers after getting too enthusiastic with the gain/volume.

Sent from my SM-N920V using Tapatalk
Mike Butny likes this.
Pradeep2 is offline  
post #46110 of 51123 Old 12-07-2018, 04:04 PM
AVS Forum Special Member
 
chucky7's Avatar
 
Join Date: Apr 2002
Location: Rancho Cucamonga, CA
Posts: 4,545
Mentioned: 293 Post(s)
Tagged: 0 Thread(s)
Quoted: 3473 Post(s)
Liked: 4362
Quote:
Originally Posted by Pradeep2 View Post
I'm pretty sure all the ID sub manufacturers have driver protection programmed into the amps. Otherwise they would be getting a lot of returns from those who melted down their drivers after getting too enthusiastic with the gain/volume.
Yes, indeed.

However, due to various factors, these companies all have different defect ratio. In addition, due to different design philosophies, some ID sub companies might have more stringent protection.

Speakers: L/C/R: JTR Noesis 212HT. Surrounds: Jamo C103, KEF Q100, Polk Audio RTiA3.
Subwoofer: JTR Captivator 4000ULF.
AVR: Denon AVR-X4400H. TV: Samsung UN75NU8000FXZA.

FS: Jamo C103, KEF Q100 and Polk RTiA3
chucky7 is online now  
Sponsored Links
Advertisement
 
Reply Subwoofers, Bass, and Transducers

Tags
chuffitychuffchuff , chuffmaster , Denon Avr 3313ci Receiver , Denon Avr 4520ci Receiver , Denon Avr X4000 7 2 Channel Home Theater Receiver , hr chuff'n'stuff , Power Sound Audio , Power Sound Audio Triax , psa , Room Equilizer Wizard Rew , s3000i , s7201 , tv36 , v1500 , V1800 , v1801 , V3600i , Velodyne Sms 1 In Room Bass Correction Kit With Included Microphone , Xs30 , Xv15

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off