Too many variables to make categorical statements. Separate power supplies CAN make big difference, IF they are of sufficient build quality. Crosstalk is nonexistant, but that benefit can be negated by other sonic factors. It all depends on to what stereo amps the monoblocks are being compared, quality wise and how the monoblocks are configured, within a system. Personally; I like 'em.
Do Mono Block amps provide better sound ??
My question: do monoblock amps, that is, one amp per speaker, provide better sound than one box stereo amp?? I have read that a pair of mono amps provide the best stereo separation, imaging, soundstage depth.... Besides, taking up more floor space or rack space, and the necessity running a longer interconnect if each amp is behind the speaker, is it really worth it?? Thank you Jim