Yes, the original 400RB is only 200 watts into 4 ohms, but, as has often been said around here, GK amps sound louder than they "should." I've never been in a live situation where I've needed more volume than I've gotten from mine (purchased new in 1985). What you do get from the more powerful heads is more clean bottom end (that chest vibrating, pants flapping thing); but that can sometimes be too much for certain rooms, and the 400RB's articulate midrange works better in those situations. (For me.)
BTW, in October I picked up an additional one at Guitar Center for just over $100. It's a 1994 one (a "mark II", with detached power cord) and it sounds just as good as the original. So, you can find amazing deals on these things. They are classic amps.
Last edited by dougjwray : 02-26-2014 at 06:01 AM.