Okay, I just got home and immediately popped a beer and plugged in the lil' amp that could.
First thought: I plugged straight in, turned everything up to 10, rolled back the Master Volume and it was very Marshally....a bit on the bright side. The distortion is trademark Marshall. Then, I rolled the Preamp back to Zero and turned the Master to 10. Very clean. Still a bit bright, so I rolled the presence back to halfway. Still bright, but very clean, which is good.
With a bit of fiddlin, I should have this sounding pretty good as a power section for the MP-2. It's much louder than I expected, I can see it keeping up with a drummer. I love the fact that it's SS. I have a feeling I may be in the market for a different speaker (it has a G12m-70 Celestion), but I want to see if I can coax a ballsy tone out of this first. If anything can do it, it's the MP-2
UPDATE: 4 hours later, I just got home again and plugged the MP-2 into the Marshall again...fiddly dee dee ddee, I play with my knobs until ....the balls are there. I'm pretty sure I'm adjusting the Marshall's EQ to compensate for the other two EQs at play here in my MP-2 and my GX-700. Whatever, it sounds pretty damn good right now at bedroom levels. I cranked it for a second and, just like a SS amp, it was the same only louder. Nice. A bit brighter at high volumes, but easy to hit the MP-2 'Room EQ' for a quick fine tune.
This little thing has a bit of volume too. I think it'll do fine