Hi, Could you either direct me to a thread where the concepts and their differences are explained or kindly enlighten me on the subject in this thread? I've played bass for quite a while but never checked these things out since I've always played with a combo. I only know that a combo is a head and cabinet in one and I think a head is a power amp and a preamp in one. Could you also explain advantages and dissadvantages of combos and head+cabs. Thank you!