#1
im replacing the stock tubes with jj tubes and i was wondering if i would have to bias the amp in order for the tubes to work at their full potential and if so i was wondering how to go about doing that, any help would be greatly appreciated, thanks
#3
Yes, the power tubes are 6L6's, so it needs to be biased. I have no experience using a bias probe to bias the amp, so I would just pay the $50 or whatnot to have it done professionally.
#4
shoot an email to B-52. they will send you a schematic and directions on how to do it...

At least that's what the B-52 rep told me. I still haven't changed tubes yet... it's still too new for me to think about that..
B-52 AT-100 2X12 amp
Yamaha
gibson LP
Epi LP
Strat Knockoff
GNX3000
TS7 Tubscreamer
Various other pedals