Really? Wow. I also owned the MC275 and C2300 (rather than C2200). Thought it was utterly awful. Probably the muddiest and low resolution amp / pre combination I ever owned by a large margin. That was with very efficient speakers too.
Indeed they made some great stuff--in the last century!--I gave up on the brand after spending squillions on a MC2300--sounded as you described
perfectly!--shut down on every transient /etc--it was good as a Boat Anchor!
I've tried to like the demos of the latest stuff-- sorry not for this boyo!
BruceD