Hi there,
I recently changed the tubes to JJ E34L's. Whenever I'm in channel 2, in raw or modern modes the presence knob does absolutely nothing. When I switch to vintage mode it goes from either no presence at all, to ear piercing super harsh high end as soon as you're past 12 O'clock. I've tried calling all the repair guys in town and Mesa but everyone's gone for the holidays.
Any ideas on what the problem could be?
I recently changed the tubes to JJ E34L's. Whenever I'm in channel 2, in raw or modern modes the presence knob does absolutely nothing. When I switch to vintage mode it goes from either no presence at all, to ear piercing super harsh high end as soon as you're past 12 O'clock. I've tried calling all the repair guys in town and Mesa but everyone's gone for the holidays.
Any ideas on what the problem could be?