I came across this in my trawl through cyberspace: http://www.geocities.com/Area51/Hollow/3401/ratevsac.htm In general it seems to go along with peoples experiences with respect to the accuracy of the claimed power output. (ie. Nad, HK, Rotel perform above spec, cheaper models don't). A few points I noticed: * The Sony results are comical, particularly as they claim their AV amps aren't designed to be used with all channels driven. * The new Yamaha seems underpowered. * Marantz SR7200 had a surprisingly poor power rating but excellent noise level. * The Denon's didn't drop as much as I've read about.