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Channel Imbalance at low volumes

Hi guys!

I got a sweet sounding NAD 7175PE the other day! It sounds rad at high volumes, however, at low volumes a significant channel imbalance appears. The left channel becomes MUCH dimmer than the right. The problem exists while using either the A or B terminals, but it also flips sides if I swap the left and right speakers, so it's not the speakers or speaker wires. Interestingly, the "A+B" speaker selection produces no sound for some reason. Not sure if that gives any clue as to the cause. Anyone know what's wrong? Thanks!
leemaze

Showing 1 response by erik_squires

erik_squires
16,472 posts
 
The most obvious things to clean/replace are the volume and balance pots, but don't forget any speaker switches or relays.

Over time they get corroded and can act like little diodes. I had this happen with a Yammaha P2050. Replaced with new and much better relays, and added sockets for next time, problem solved.
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