These ratings are at 14.4 volts. I averaged 13.5v when I did not have any electrical upgrades. When I first set up this amp I underestimated it because I blew a 200Wrms subwoofer (the gains were set with a multimeter so this was not due to clipping). So I believe it does close to what it claims.
Also, I forgot to state that if you want to know about me go to the canadiancaraudio website and ask around about lspade69. I am a regular on that forum and I am currently selling a subwoofer to some dude in canada so I should have some positive feed back in a while. (Just some info so you guys know I am not a scammer, I know there is alot of that going around these days)