My Onkyo 508 has powered everything here from a pair of ADS 200's to a pair of Bozak Concert Grands. No complaints from me on anything. It's toughest challenge though was a few years ago doing stand in duty for my Mcintosh MC2500 while the Mac was getting serviced. That much smaller 508 did an admirable job of running my current hungry Polk 1.2tl's.
