I should thank you. There was a plate that belonged on the back of the amp to mark what it was but it was gone. Looking for an i.d # i found the label to it. then looked into it. Its a session 500. It's alot better of an amp then i thought havent found up much to make its sound the way i want though. Check out the specs here --> http://www.fmsystems.net/sp_session500.htm