My old Mesa Boogie MK llb. No reverb, no graphic EQ. 60/100 switch. When I get that thing cranked, and I do mean cranked, those 6L6's sound just so sweet. Sustain is totally effortless. My LP sounds like a dream going straight into it!!
But man is it loud. That power tube OD is da shzzz.
It also has the sweetest clean too. Pristine, clear, rich lows.