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Moosergooser
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Joined: May 13 2012 - 5:12pm
Buzzing at low volume on one speaker

Have a Harmon kardon avr 225 with infinity speakers. Recently, I noticed a buzzing out of my front right speaker at very low volumes. The Buzzing is virtually gone at normal volumes and above. I switched the front speakers and the buzzing stayed in the same location, so I believe it is a problem with the receiver. The buzzing is loudest at the lowest volume and gradually get softer as I increase the volume. Totally gone if I mute or unplug the input. Input is a optical cable. 

Moosergooser
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Any thoughts on what I can do

Any thoughts on what I can do to fix this? Thanks.

John Atkinson
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Joined: Nov 7 2010 - 3:31pm
Re: Buzzing

Moosergooser wrote:

Have a Harmon kardon avr 225 with infinity speakers. Recently, I noticed a buzzing out of my front right speaker at very low volumes. The Buzzing is virtually gone at normal volumes and above. I switched the front speakers and the buzzing stayed in the same location, so I believe it is a problem with the receiver. The buzzing is loudest at the lowest volume and gradually get softer as I increase the volume. Totally gone if I mute or unplug the input. Input is a optical cable. 

Impossible to diagnose at a distamce, I am afraid, but it does sound as if something in the D/A section of your receiver has failed. Have you added any other sources? Do you get the buzzing if you switch to other inputs?

John Atkinson

Editor, Stereophile

shawndaiki
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Joined: Dec 10 2013 - 11:00pm
Amp problem

Hi Moosergooser

What you described sounds very similar to what I did months ago. 

I first swopped the speakers around to determine if I might have unknowingly damaged them. Thereafter I swopped the speaker cables althought after speaking to the local dealer realised was unnecessary, that's a component which doesn't trip often esp with banana plugs. 

When it doubt I think an additional source always helps with troubleshooting as John mentioned. I finally used a standard audio cable to hook up my iPod realised it was the amplifier. 

Hope this helps and good luck. 

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