The Sherbourn amp is different than the Outlaw 7900. They do look similar, but that's it. The Sherbourn amp is a digital switching Class H amp. The Outlaw 7900 is a fully balanced Class A/B amp. I own the Outlaw 7900, and it's a fantastic amp, powerful and clean. Only down side is needing two 15 amp circuits to run it off of, but that's a plus too cause it will do what it says it will do in the specs if hooked up properly on two circuits.