Center Speaker Distortion - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 7 Old 03-29-2010, 12:10 PM - Thread Starter
AVS Special Member
 
720p's Avatar
 
Join Date: Jun 2006
Posts: 1,388
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
On a few movies I get distortion on my center speaker. The distortion happens when a man & mostly woman yells during the movie. The distortion sounds like clipping as if I'm playing a badly encoded (clipped) mp3 file.

Now all my speakers are practically the same. The wires & plugs are expensive and the center is bi-wired. I always listen at low levels and all the speakers have been calibrated by amp and/or sound meter. I'm sure the center is not damaged as I can crank up the sound far beyond my listening levels.

I have recalibrated to no effect. The clipping may happen once or twice during the movie or not at all. Any ideas what's wrong? During the clipping the speaker is cracking and you can't but cringe.
720p is offline  
Sponsored Links
Advertisement
 
post #2 of 7 Old 03-29-2010, 12:44 PM
AVS Addicted Member
 
afrogt's Avatar
 
Join Date: Jul 2003
Location: SF Bay Area
Posts: 23,019
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 165 Post(s)
Liked: 379
What receiver do you have?

Afro GT
afrogt is online now  
post #3 of 7 Old 03-29-2010, 12:49 PM
Advanced Member
 
Menasor's Avatar
 
Join Date: Oct 2008
Location: SF Bay Area
Posts: 719
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 15
How high are you turning up the volume? Sounds like you might not be giving the center enough power. The center speaker plays most of the sound in the HT track so it gets pushed the hardest.

[HT]

Energy RC-70 Rosenut
Energy RC-LCR Rosenut
Energy Veritas 1.0CM
SVS PC12-NSD
Pioneer SC-1522-K

 

[Desktop]

Emotiva Airmotiv 4

Sennheiser HD555 modded


Pics of my setup

Menasor is offline  
post #4 of 7 Old 03-29-2010, 01:26 PM - Thread Starter
AVS Special Member
 
720p's Avatar
 
Join Date: Jun 2006
Posts: 1,388
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
It's an old yammy receiver 7x130w rms. 5 channels driven it gives out a mere 32w per channel but that shouldn't be a problem as the clipping happens at quiet parts of the film when one decides to shout.

If I turn up the volume I think it will just clip & distort more. If I set my receiver to 5ch stereo the center keeps up just fine with the rest of the speakers.
720p is offline  
post #5 of 7 Old 03-29-2010, 01:57 PM
Advanced Member
 
Menasor's Avatar
 
Join Date: Oct 2008
Location: SF Bay Area
Posts: 719
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 15
Quote:
Originally Posted by 720p View Post

It's an old yammy receiver 7x130w rms. 5 channels driven it gives out a mere 32w per channel but that shouldn't be a problem as the clipping happens at quiet parts of the film when one decides to shout.

If I turn up the volume I think it will just clip & distort more. If I set my receiver to 5ch stereo the center keeps up just fine with the rest of the speakers.

What are you watching? a DVD? Bluray? divx? x264 bluray rip? It might be a source. Does this happen with everything you watch? Are you using PS3 Media Server?

[HT]

Energy RC-70 Rosenut
Energy RC-LCR Rosenut
Energy Veritas 1.0CM
SVS PC12-NSD
Pioneer SC-1522-K

 

[Desktop]

Emotiva Airmotiv 4

Sennheiser HD555 modded


Pics of my setup

Menasor is offline  
post #6 of 7 Old 03-29-2010, 02:01 PM
AVS Special Member
 
cdy2179's Avatar
 
Join Date: Dec 2005
Location: central Louisiana
Posts: 1,586
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Liked: 27
swithc wires and make one of the mains play center during a scene that you know does it and see if its the speaker or the AVR.
cdy2179 is online now  
post #7 of 7 Old 03-30-2010, 02:15 AM - Thread Starter
AVS Special Member
 
720p's Avatar
 
Join Date: Jun 2006
Posts: 1,388
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Sorry should have mentioned it is on dvd as that's what I mostly watch. I already had 2 dvd players and one blu-ray plus htpc so it's definately not the source. They all do it. Not using PS3 either. Next time I happen to find a scene with the clipping I'll mark the time & volume level and start switching speakers.
It is as if the very top end of the dynamic range is being clipped (cut) off and replaced by crackling and distortion. It only lasts 2-3 seconds so I always forget about it so thought I ask here, maybe a simple explanation exists. I did a search on the forum and while I found others complaining about the same issue no straight answers were given. I'd understand if we were talking about cheap plastic tv speakers with cheap build-in amp driven very high but this is not the case.
If you have a dvd where you get the same problem just say the time stamp and will rent it and test.
720p is offline  
Reply Speakers

User Tag List

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