HK conservatively rates the AVR-630 at 90 Watts per channel in 2 channel mode. And 75 Watts per channel in 7.1 mode. If you are using 5.1 then the extra power from the two channels not used gets re-directed to the 5 that are.
I'm sort of a nubie at this but I find that -15 db. on the volume control is about as loud as I can stand. That leaves a ton of headroom for peaks. Remember you only get one pair of ears. I wish I knew that back in the seventies when I went to rock concerts twice a month. The Who played so loud that my head was ringing for days. Anyway, I digress. I find that the 75 Watts from my AVR-630 is more than enough power. And it's very clean.
