Just the one amp in use here, a late 1980s JVC AX-Z1010, which I think might have been from the same range as the OP's JVC AX-A441. It's a big TOTL 'titanium' finished beast with a very good built-in DAC.
I also have in storage a previous Rotel RA-04 and a mid-1970s Sony STR-7065A receiver, if that counts.