So the Mark II just got has a simul-class sticker on the back panel, and a half power switch on the front. Its a long head. So do you think this is a Simul-Class amp?
Yes. Every, I mean, EVERY wide chassis head says "Full / Half Power" when it's really Simul/Class A.
I guess Mesa thought it was easier to understand than "Full / One-Fifth Power", which is what Simul-Class actually is.