I am using a pair of McIntosh MC2205's for my bi-amlified speakers, these are circa 1977 if I am not mistaken, 200W with autoformers, everything is original, and they are still running. My speakers are 96dB and in bi-amplifed mode I usually can't go above 20W per channel for each amp in a very large room, this helps keep the amps relatively cool.
My only problem with these are the weight, at 85 pounds each they are too heavy for my back.
My only problem with these are the weight, at 85 pounds each they are too heavy for my back.