Watts is never enough, it ain't louder, it's control, and detail, it matters. i started out with one 500W amp decades back went to two, then 4 driven each now in mono with AVA hybrid phase inverters 2 of of them, it changes EVERYTHING P500 with AVA ckts are 1200W + in mono.X 4 ! 3 separate AC line ckts, to not pop the breaker. due to the huge AC mains transformers,, it opens up and controls Legacy Whisper to the nth degree, one 500 W amp is lifeless, 4 in mono is ALIVE, not louder, just BETTER. always go for the WATTS pristine AVA watts of course. Listening at realistic levels of close to 100dB is ALIVE, not stressed or strain, with current and watts! AVA puts everyone in AWE