What was/is the heaviest weight amp you herd/own

I suppose you mean, "weight per channel"? Or mono's don't apply?
Anyways, I had a stereo class A that weighed 165lbs. (Still have it, btw, & it still weighs the same:))

Ellery sez: "how much do your complete systems weigh???"

Good question, never thought of that before... just under ~500 not counting racks etc.

If you think that's heavy, ALbert Porter's record player + paraphernalia, alone, is probably heavier...