Can I tweak L-R balance by differntial biasing?

Very interesting idea. I am also trying to deal with an asymmetrical room and a preamp without balance control...

Doing that will probably make the 2 channels sound different from each other. I have no idea if you would be able to hear the difference if that's the case. But its something to consider.

All- sorry about the misspelled subject.
Zd542- I thought of that but desperate times call for desperate measures ;-) Also I was thinking about only going from 0.20v nominal to 0.19v. So far the bias seems rock steady so I might go to a more sensitive scale on my VOM and try going up 0.05v on one and down 0.05v on the other. I realize that the differential is the same but...who knows. I readily admit my technical ignorance so i thought i'd throw this out there any see if anyone has ever tried it.

Hi Michael,

I'm not 100% certain, but I don't think that approach would accomplish what you want. I believe that gain, which is what you are trying to change, will vary very slowly as bias is adjusted. If you want to unequalize the gains by say 2 or 3 db or more, I suspect that you would have to change the bias setting by much more than the maximum recommended reduction of 10%, even if you were to raise the setting in the other channel by a reasonable amount. That would most likely result in the sonic quality of the amp, as well as its maximum power capability, being considerably degraded.

Best regards,
-- Al