Hi experts,

How much DC offset would you consider acceptable in a power amp?
What can you do on a rainy Sunday afternoon? I was poking around inside
an old Rotel RA-970BX amp. It works OK except that the DC offset is
about 100mv and 50mv on the two channels, which seems rather high to me.
There is no adjustment, except for bias current, so any tweaking would
probably have to be adjusting the current in one of the long-tailed pairs
by swapping resistors.

--
Eiron.