Alright. I'm playing bass for the better part of my life, and I've always thought I knew about this, but if someone asked me I couldn't answer them difinitively. I've never really cared about amps, have my Peavey all my life, bought a couple of other cheap combos here and there... but never, ever got gas for an amp like I have for a bongo. Yeah - I'm serious about this.... Arrrgh... this is rough... uhhh.... What's the difference between an amp and a preamp, and whats the purpose? If preamps don't have any power (which is what I think it means) how come I don't see any power amps without the preamp advertised. Why also would seomeone pay lots of money for an amp with no power? There.