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The volume of my speakers going down by itself and going back again in a minute or two

I just upgraded a used Audio Research tube Preamp and a power amp. I found that the The volume of my speakers going down by itself and going back again in a minute or two. What could be wrong? Both amp and preamp are used. I had my speakers for 20 years. Never had the issue before. Help!

carolinaboy2

Showing 1 response by ghdprentice

ghdprentice
7,646 posts
 

I'm thinking the possession thing. 
 

Both channels are experiencing the volume change? While I have never heard of such a thing... if it is in one channel, I would suspect a tube. ARC is really well made... so the most likely culperate is a tube.
 

ARC will have one tube for both channels or two or more per channel. If the problem is in one channel. Then switch the 2 or four tubes per channel in the Amp first and see if the channel changes... then try in the Preamp. If it is both channels, get a replacement and se if it goes away. 
 

 

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