Those vintage Sony Home Theater/Entertainment systems are absolute powerhouses. Rattling windows isn’t optional, it’s standard at anything above 1/8th volume.
Mines driving 12 4ohm 50w speakers and a 500w sub at the moment. I need to add my Equalizer Deck and Amp Deck to the unit before I can power my 6’ Tower Speaker Cabinets though.
If I get fancy, I can Loop/feed the system back through into my Peavey Half-Stack. Pretty sure that would have the neighbors calling the cops on me though, and they’re not exactly close/nearby.