Got a gig coming up and I don't have an amp. What I do have is: 2 JBL315's A HD 300 (with the Ampeg B15 model). Has anyone tried this or should I try my best to borrow a amp. The band has two LOUD guitar players and I just wondering if this would be enough for a bar gig. Just to throw out; the amp I might be able to borrow is a SWR Red Head 2x10 combo. Thanks.