in my experience it depends on your setup (ie cables, tweeters,) ive owned amps which sounded great no problems, but did recently have a Jadis Orchestra Reference which made female vocals at high freqencies distort.
all in all, if it is easy to do, (ie biasing pots in handy places) do it....
ive owned amps which needed quite a bit more work than that and used my ear. you can also swap driver tubes from channel to channel
all in all, if it is easy to do, (ie biasing pots in handy places) do it....
ive owned amps which needed quite a bit more work than that and used my ear. you can also swap driver tubes from channel to channel