so i was messing around with my ampegs, by running the bass into the b25b, and then out of the external out (on the back) into the v4 stack. thing is, i never noticed that even on standby, the preamp section is live on the b25b, so i can drive the hell out of it before it hits the v4 (or the FOH)... is this normal? i had work done on the b25b, cap job and everything gone over, new output tap, 7027s. maybe the tech added this output? or maybe it was always there (i've had the b25b since 1996 or so).