Hi all I just put one of these 400 watt all tube monsters on layaway as my Xmas present to myself. I tried this amp out for a hour a few nights ago and man oh man this thing rocked! I A/B'd it with a new Ampeg SVT classic and the PV blew it totaly away in tone and noise, and I love the crunch channel. 8 6550's, 5 12ax7's, 1 12at7. Anybody play through one of these goliaths that can tell me a little about it? What speaker configuration works best, I played it through a 4 10TVX cab and I played it through the 8 10TVX I liked them both but I think I'm gonna go with the 810. This is going to be my Rehearsal and studio rig My Eden is still my gig rig.