I agree speakers make the Biggest difference in sound, processors and amps don't do much, I am not crazy about room correction, digi eq, and all that stuff, I just cross to the subs, balance the levels with the spl meter and call it a day, I have tried it all different ways, its the best bet.. I tried audy and emo and the pioneer mcaa or whatever it is, and I prefer doing it manually, although the pioneer is the best one, IMO