Since "unknown tones" don't really make good equipment advertising,
unknown to you hopefully is within an understanding to the rest of the
band ... else it's going the night of suck if all-around an orphan
wildcard baby is what you're left to deal with. . . .Hey, look here,
all the tubes are crap. ...Try, I'll play but don't expect cover or
signature sounds. If you're otherwise unable get a handle on it, I
suppose the best thing to do would be to blend for some minimum level
of unobtrusiveness -- efficacy at the golden mean of lower volumes. If
no one else there knows squat more than you about playing that
particular amp, other than it's an amp another regular member has
(somehow) managed, might be fun making up really outstanding excuses.
An ancillary aspect to creativity overall for competent musicianship
on a stage of the hardened-skin persona. . . .Past sucking tonal air
out of the sails of everyone around, if you're certain you technically
play well enough for the mix, relax, what's left to feel about great
and glorious spoonfuls of humble pie?
--
'I always keep in mind what I'm giving in return to people paying me
their wages.' -Fogelberg, CCR