I’m down from 255wpc with a Hafler DH-500 to 17 wpc from Dyna/VTA 70 with KT66 in triode mode. Plenty loud for me with average efficiency speakers in a 24x24 ft room, and sounds amazing.
30 to 50 watts seems to be all I desire
Weird, but in my small listening room (12x16) no matter the speakers used, to a T they all can be driven quite superbly with amps in the 30 to 50 watt range. This includes the Maggie 1.7.
I had a few 200 watt amps in rotation but took them out for now because I never got past about 8:00 or at most 9:00 on the preamp, and oftentimes it was around the 7:30 mark.
So I personally don’t buy into the lower efficiency speakers needing gobs of power to sound good. Caveat: Listening to mainly Jazz at volumes less than 85db, normally.
Cheers, all.