Channel Imbalance at low volumes

There is no crackling whatsoever.  You still think cleaning is worth a try?

But it sounds so good at high volumes!

What should I expect to pay for a tune-up?

Thanks!

@willemj it does indeed happen with all sources. The volume does gain VERY quickly, however the amp has a built in “low-level” button which brings the volume down by 4-5dbs so the knob can be turned up more. Would this be done by a built in attenuator? However the imbalance is still present at the same low audible levels. 

I tried lots of deoxit however it didn’t help. I couldn’t really get to the pot though so I was shooting a little blind - is there any source for a schematic or service manual?

In addition, I moved the amp to my kitchen which is a large room (~40’ long) so I’m listening at higher volumes more often and it’s noticeable less often. 😉

Ah thank you! What my blank posts were supposed to ask is what Db level attentuator should I get?

Also, if the volume knob is always around 12 o’clock, does this make the amp work harder to potentially burn out faster? Is there any degradation of Sq?