Question about NAD C370 2-Channel Amplifier

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NAD C370 Amplifier

When I switch the amp on it makes a loud buzzing sound that comes from within the amp itself and also comes though the speakers. It gradually fades away over a couple of minutes. What could be causing this? I have checked all my connections and everything seems fine.

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  • Anonymous Nov 22, 2008

    Hi I have had the same problem with my nad c370 a few times over the last eight years which was repaired under waranty the first two times, also on a second c370 I bought to bridge and use as a backup because Ive found the c370 so unreliable, It is the caps in the protection circuit. I was quoted £175 to have repaired through audio t. though I got it done for £60 in a local tv repair shop.

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This sounds like a problem with the protection circuit, and/or the speaker relays. More specifically, a capacitor within those circuits that is not behaving properly. I strongly suggest having it looked at ASAP. 

Posted on Sep 17, 2008

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