I finally have everything for my av setup up and running. It uses DSPs for all the crossovers except the sides. It is wonderful, better than drugs, I think largely because I am "doing it myself." I bought kit speakers but am not using the included crossovers. Its wonderful being able to tweak the crossover point and slope, the delay, the levels, and phase without rewiring. Its been a real difficult chore for me but it has been worth it. Next step is some measuring although I'm certain I'm close to what is needed. I have been terribly depressed this past month but believe it would have been worse without this to occupy myself. I had gone several years without a real audio/video system and finally have been able to concentrate enough to set this up, much better than it was before.