bkevind Posted February 22, 2018 Share Posted February 22, 2018 As you might have surmised from the subject, I have an aging NAD C372 integrated amp. I use it to feed a pair of Forte II. I'm quite happy with the sound / performance. However on initial power up, lately I have been getting about 30 seconds of static/white noise. Then it goes away and all is well. It's not the pot, or the tone controls. Well maybe it's the pot but the symptoms don't add up. I think it's in the pre-amp section. For a short time I tried the C372 in bridged mode, paired with my C272 amp also bridged, and the noise happened then also. I have tried different inputs with the same result. Any ideas what might cause this? Quote Link to comment Share on other sites More sharing options...
geoff. Posted February 22, 2018 Share Posted February 22, 2018 It is the speaker relays. Very common problem with many amps after time. If I “crank it” right after power-on it resolves itself sooner. I have three NAD 372s, one of them does the same thing. Always the right channel. Now that I am running LaScalas I have no need to bridge the amps and am using only one amp. I flipped a coin and picked one of the amps that works fine. There are many posts about fixing this, one even suggests a better relay for DIYers. I will be going tubes before I spend another dollar on SS though! 1 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted February 22, 2018 Share Posted February 22, 2018 42 minutes ago, geoff. said: There are many posts about fixing this, one even suggests a better relay for DIYers. If there's a cap that powers the relay that could be your culprit. 1 Quote Link to comment Share on other sites More sharing options...
bkevind Posted February 22, 2018 Author Share Posted February 22, 2018 Thank you! My google-fu was weak. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted February 22, 2018 Share Posted February 22, 2018 11 minutes ago, bkevind said: Thank you! My google-fu was weak. The only reason I suggested that was that I had a similar issue with an old carver amp that I had. Quote Link to comment Share on other sites More sharing options...
bkevind Posted February 22, 2018 Author Share Posted February 22, 2018 Once upon a time I actually used to troubleshoot and fix things BEFORE asking. I've become so lazy! I don't even have a multimeter anymore, or even a decent soldering setup. Quote Link to comment Share on other sites More sharing options...
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