All the spec's can be found on the Crest site. . . this power amp has just sat in its box, been used to test a cabinet and that's it. It's very clean and powerful, I bought it with the intention to gig it, but never did and am now going to go back to a head instead of the pre/power amp setup. I also have a Demeter VTBP-201s for sale, and a Stewart World 2.1. $420, plus shipping for the Crest. Thanks, NO TRADES please. . . I need the cash.