I know this must sound really stupid, but what really is the difference between a bass and guitar cab? Obviously speaker sizes and ohms are variable either way, and watt handling, but what really is the difference? Are the speakers specially designed for the frequencies of bass or what? I've been noticing quite a few bassists using 4x12 guitar cabs for their basses (including Robert Trujillo according to Bass Player). Being now in the market for a cabinet with 12 inch speakers, it kinda seems like a good idea. Dont throw anything at me if this is a stupid question.