I have the 2105 which is rated at 90W into 8 Ohms.

I can drive two M80s, cleanly, at over 118W each. Above this level, the amp starts square-waving. This is an insane amount of power for my 4,000 cubic foot room and I cannot handle it without ear plugs. I normally listen at less than a half watt nominal per side.

I hope your friend's ears don't get damaged.