Any opinions on it? I'm currently running my bass through my guitar rig and I really like the tone, but I can tell that I'm not going to have the volume I'm after. Will 200w/channel run into a 4x10 and 1x12 (on separate channels) give me a similar overall volume to a 300w or 400w mono tube head powering both cabs? Also, for anyone who's used these power amps, were you using 6L6 or KT-88s (or other)? Cheers.