I just got a carvin pro bass 300 combo, and was thinking about adding another cab. But I heard that sometimes they can crap out at low ohm'age. it says that it can take as low as two, but nonetheless I'm concerned. Anybody with any experience with this. P.S. Anybody know if any cabs do very well with it? I realize its a combo, but as far as I can tell its the same as the head by the same name, just with a built in 15. and horn.