As posted by LowOhms, #19

a) It takes a proper amp, 99.9% of them flunk-out, ( D- to F- ) if you seek the BEST possible ALTEC listening result, which "I" do.

Need I say more. Seems that only you and a few of your guru's customers have anything worth listening to. The rest of us have amps that "flunk-out", if that is not insulting, I don't know what is.
I mean, were in the D- to F- category, now excuse me while I carry my MC40 monoblocks to the trash can and put my Altecs on the curb.
Seems I am delusional as the the fine outstanding sound that this combo makes. Only you and your guru seem to know what works best.

BillWojo