I'm a singer/guitarist who is going to be playing bass fulltime now. I have a P Bass and am looking to get a decent head. A guy nearby has an old Gallien-Krueger 300B head and cab that I have the opportunity to trade for. Does anyone know much about these? The musical style I'll be playing is original, ranging in sound from the Beatles to Pearl Jam to some blues. Would this amp meet my needs? Any help would be greatly appreciated. Thanks.