One thing George is ignoring here is that in a Mac, the autoformers are inside the feedback loop
One thing Ralph is ignoring here, is if the solid state Mac was deigned and built correctly, it wouldn’t need autoformers, inside or outside the feedback loop!
Ask him directly if he honestly believes the sound will improve with autoformer on better solid state amps, like Classe’s, Krell’s, Halo’s, Gryphon’s ect ect ect, driving speakers like 73max has, in the B&W 802D3’s! then do the comparison yourself.
As I said before, put them on your Classe CA-2300 and see what they do to it’s sound, (I’ve done it on a few good ss amps and it’s not pretty) and one of the amps was a Classe DR25!, it’s the only sensible advice given so far from the pro autoformer side.
Cheers George