Just bought a Early 70's RED SPARKLE Kustom 300 PA head and 4-10" speaker column set up. Works great, all chanels, no speaker or amp issues. Played my SG through it, did OK, mike checkall channels clear. I originally wanted this amp for a vintage look to the single acoustic/mic gigging that like I did in college. Everything was great until I tried my new Ovation in this set up. Even with the guitar gain all the way up, I could at best only get a slight crackle from the PA. I know the guitar sounds awesome through my old Fender Princeton, or my Marshall Orange crunch half stack, of course everything sounds great through that puppy, but there definitely seems to be some kind of a gain or impedence issue. Anyone have any thoughts???