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Signs of amp failure, need advice

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Posted on May 20, 2012 at 02:01:56
fanglangzhe
Audiophile

Posts: 8
Joined: February 16, 2010
I have a system consisting of INT AMP + CD player. When playing music, the sound from 1 speaker sometimes disappears. At other times, a scratching noise is generated followed by silence. At first, I thought this was due to defective CDs but that turned out not to be case. When I adjust the volume control on the amp, the problem goes away (i.e. when I turn the volume way up and then turn it back down). I also suspected this was a problem with the CD player but had that examined and it was fine. I now suspect the Amp is the problem, especially as turning the volume knob makes the problem go away. Any view on whether the amp is the problem here?

 

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RE: Signs of amp failure, need advice, posted on May 20, 2012 at 03:54:13
drrsutliff
Audiophile

Posts: 11
Location: Florida
Joined: October 27, 2008
Contributor
  Since:
September 4, 2009
What kind of amplifier are you using? It sounds like the volume control could have issues with dirty contacts and I would start with a good cleaning with some Deoxit. This would need to be sprayed into the control from the inside of the amplifier (not just down the shaft from the outside). If you are not familiar with this product or how to best use the contact cleaner there are U tube videos you can look at. Once you spray the Deoxit into the volume control you rotate it back and forth a number of times to help the cleaning process and this may eliminate your issue.
Rick

 

RE: Signs of amp failure, need advice, posted on May 20, 2012 at 05:47:55
fanglangzhe
Audiophile

Posts: 8
Joined: February 16, 2010
Thanks for the advice. Its a NAD S300 int amp purchased in 1999.

 

Speaker relay ?, posted on May 20, 2012 at 05:50:06
djk
Manufacturer

Posts: 5643
Joined: June 17, 2000
If it has one, clean it (or replace it).

I have seen this problem with NAD, even with new amplifiers.
Not 2 Big 2 Jail

 

RE: Signs of amp failure, need advice, posted on May 21, 2012 at 12:14:27
Kindablue
Audiophile

Posts: 455
Joined: August 7, 2003
Good advice that is what I would do too dirt can be very nasty to any audio system. Cleaning cant hurt it as long as it is done right.

 

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