I have an old Pioneer SA1480 that does 130W per channel. Only does 2 channels. Built 1987-88 era. Very little info on it out there. Has a built in 7 band equalizer.
I’m thinking of bridging the channels to drive a 15″ subwoofer for my home system. 280W may do it. But I’d rather get 1000W, if possible.
If you need the schematics there are here.