My receiver is rated at 130 w/ch for 8 ohm loads and at 120 w/ch for 4 ohm loads at 0.1% THD (of course, those are published specs; I've read where the measured output is less) so hopefully I'll be covered at least for my intended use. I'm aware that Sony is notorious for less-than-adequate power supplies but hopefully their "flagship" model would be beefier...