I got to try my new (used) 400+ last nite at practice and it lived up to all the positive comments I've heard. I have until Monday to return it, but it ain't goin' nowhere! What an experience! I didn't even have to mess with any settings, I left the EQ flat, bass at 4, mid at 4, treble at 2 and got air moving like I've never felt before. My lead player said he could feel air at 8 feet away, my back was actually vibrating (SWR Goliath III 410 and Eden 115 XLT). When I first turned it on, I thought maybe it could use a little more bass, once we started playing I forgot all about it. Even better, we picked up a 2nd lead/rhythm player who brought his rig in last nite, and I had NO problem punching through them at will and I heard every note I played. I kept asking if my volume was too high because it sounded overpowering to me, but everyone said leave it alone. This was with my Fbass, when I plugged in the Rob Allen I thought the ceiling was going to collapse. The guys are happy. After practice, I went upstairs and asked the resident "she" if she could I was too loud, she said other than the heater vents rattling, nothing was damaged. This has definitely put my Eden WT300 into a backup status. RB, I'll send a check Monday, just wanted to make sure I was keeping it. BTW, it has 425 tubes in it.