What you're doing there is Bi wiring your speakers, yes quality can be better but it is negligible, plus if you consider the crossovers supplied are probably set up in a laboratory to give the best sound from the speakers, you'll really struggle to match that yourself with the amp, also then in order to get 4 channels, you'd ideally have to have 2 sets of phono's going into it, which would require a splitter and then loose quality. I'd stick with the crossovers myself.