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Discussion Starter · #1 ·
I am having a problem with my new home theater setup. I am running 5 Axiom speakers with a SVS sub and a HK525 all connected with RCA 14 guage wiring with gold connectors. The problem I have is that I get a scratchy sound on the diologue when someone is yelling in the media content (peak sounds). Now I thought it was a problem with the reciever so I got a replacement from J&R and still have the same problem. I also thought it was a problem with the speaker so I switched my center with one of the front surrounds and still get the same noise. I also tried new speaker wire and that didn't help. This noise happens on all sources, regular cable (analog) and DVD (digital coax). I am running out ideas on what it could be. The only things I can think of are dirty power fromt the wall or that the replacement reciever is bad as well. What do you guys think? I was thinking about buying a power conditioner and seeing if that fixes it. I can probably get another reciever fron J&R but I am only going to request it as a last resort. I am running out of time on the replacement window (10 days) so any quick help would be appreciated. Thanks everyone!
 

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Additional things to look at: Insufficient power, either from the wall or from the receiver; peculiar mechanical rattle (are you absolutely sure the noise is coming from the speaker and not under the floor or from the wall behind?); a loose cable connection...


Too little power would be my first guess - but still just a wild guess.
 

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Discussion Starter · #3 ·
"Too little power sounds intriguing" How would I test for this? Thanks for the suggestions!
 

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Other than trying a much powerful amp, you can't. How big room, how heavily acoustically dampened, how sensitive are the speakers and what is your current amplifier power output?
 

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Discussion Starter · #5 ·
The room isn't huge, I think 13x10x7(ceiling). The floor is carpet and the walls are wood panel. The sound really appears to be comming directly from the speaker but I could be wrong. Is there any way to test the room acoustics?
 

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Discussion Starter · #6 ·
Amp is 70Wx7. HK's are suppose to be conservative with power ratings. The thing is really heavy - 40 lbs and is suppose to have a huge power supply.
 

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Doesn't sound like 70W would be too little - unless the speakers are really inefficient or the impedance (ohm rating) between the amp and speaker is really off. Ok, another theory (even wilder): Perhaps your acoustics are bad: You have parallel front and back wall, with little or no furniture etc. against either wall to break the parallelism. If so, you might get a strong front-back reflection, interfering with the sound from the speaker. That would sound really nasty.


To significantly change the acoustics, even for testing (if that sounds as a likely culprit in the first place; I said wild...), you need drastic measures; such as moving a few mattresses and put those against the walls etc.


Ok, I'm running out of possible explanations...
 
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