I'm looking to buy a decent Pa system for use djing, for my band, and for shows that I hope to be putting together. Right now, we have a 300 watt powered peavey mixer and 2 avatar 15 inch pa speakers. Sometimes we DJ dances for the local schools and other events, but the bass is very minimal. So I'm looking at a pair of speakers like we have now, 1 or 2 18 inch passive subs, a 8-16 channel mixer, a cd player, and one or two qsc? power amps. All rack mounted. Since I've never used power amps or subwoofers, what would i need to do to make that work? And how would i separate the lows to the subs and the highs to the mains? Would i need two separate power amps? And what kind of mixer would I need to do that? All help is greatly appreciated, I'll probably have more questions I may post later. Thanks!