The subject of power and loudness has, to me, always been one of black magic rather than science, so here's probably a complicated question asked simply. Suppose you want to build your own amp. You have a design for something that'll put 100 watts into 4 ohms. In theory, if you were to duplicate it, such that you had 2 4-ohm speakers in one cab, one pre-amp driving 2 power amps, and each amp putting 100 watts to one speaker, would you then have 200 watts, or two 100 watt sides? I would like to build my own amp to be able to take to the occasional gig (I have no illusions of playing anything larger than a pub or club), but so far no one I've asked who went and bought something huge and, for me, WAY too expensive, has ever told me IF they gig, much less how big the audience is. So for my second question, does anyone gig with 200 watts or less? And if you do, what size of place are you gigging in? Freddie singing, Jimi on lead, Keith on drums and now John on bass....now that'd be a gig!!