Kinda curious about pro audio power amps and what they offer over commercial amps. I know that they're generally overbuilt, have high power output, and can be found used for cheap prices. It seems like using them would require a pre-amp as well, which may alter their sound. If I wanted to try out a cheap pro power amp, what should I be looking for? @purrin, I know you used to use a crest CA-2 for your speakers before you used the Rag. And I remember @Rex Aeterna using some pro amps as well. Anyone else who has experience using one?