The only powerful amp I owned was a McIntosh MC2250.
This is a very clean one:
https://www.ebay.com/itm/294692495680?mkevt=1&mkcid=1&mkrid=711-53200-19255-0&campid=5338381866&toolid=10001&customid=f27c560e-0aa5-11ee-855a-313062313365
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Published Specs say 250 wpc, mine tested at one of Harvey’s ’McIntosh ’Lab Day’ at 305 wpc within specs. Lab tech told me that was typical for this model.
’Lab Day’.: You scheduled an appointment with a McIntosh tech at Harvey’s on 45th Street, they re-certified your used piece, gave you documentation ....
Lugging that 80 lb beast is an unforgettable experience. It was a gift from a friend in NYC. I pre-scheduled the appt, picked up the amp at 55th and Madison, straight to Harvey’s.
I had a compact rolling cart, like airline people use, amp in a protective bag, strapped to the cart. Couldn’t tell what it was, a big rock perhaps.
Got a cab, little Japanese driver, we got the beast in the trunk together. He looks at me, no words, but a WTF expression. Down 5th Ave, right on 45th Street. Big Sign ’McIntosh’ hanging across the width of the store.
Cab driver sees sign, points at the trunk, says ’McIntosh?'. I say YES, he smiles big time, opens trunk, refuses my help, pulls the monster out by himself, and bows like I was the Emperor.