Not sure this was a great idea, but I just picked up a 4-5 year old SM400s - just used it on it's first gig. I used my '72 fender jazz and 2 SWR 4x8 cabs, and it sounded awesome - much better than my GK 700RB. No complaints about tone really, but what worried my was that after the 2.5 hour gig, the amp was HOT - I nearly burned my hand touching it. Do these things not have fans in them? - I didn't hear one in mine. If so, is this something to worry about, or do these amps usually hold up ok? Thanks for reading.