I've got a M-Pulse 600 in the heavy duty Mesa rack case. Specs can be found here. http://www.mesaboogie.com/Product_Info/Bass_Amps/M-Pulse-600/M-Pulse-600.html Also comes with 4 button footswitch that controls compression, EQ, Solo and the effects loop. This amp does not have Speakon outputs. I really like the sound of this amp with my P-bass and my G&L. It's huge, clean and warm. I've only played through tube amps not having owned one but this amp does have a nice tube vibe IMO. It stays clean at very high volumes and is very articulate without being overly snappy or sizzly. You're able to get pretty much any tone you'd want out of the EQ section. I generally bypass the EQ, It can do great things for your tone or it can turn it sour just as quick. I'm looking for something like the G-K 2001 RB, a Mesa Big Block, Mesa Carbine or maybe some kind of Eden. Not interested in super hi-fi amps. Throw some stuff at me.