ok i have the pioneer 80prs, 12inch mofo, and polk momo components all around, i have hpf on headunit set to 63hz with 12 octave i tried 6 and 18 octave 12 sounded most natural to my ears. also i tried runing with hpf since they were components but it wasnt as clean or tight so u have it on 63hz. also on the 4 channel amp has crossovers also i get confused there because if the head unit has it and the amp has it plus the components have their own crossovers thats like 3 filters but anytime i try only using one it doesnt sound as good so i have the amp crossovers on also they sound best around 80hz. is that normal to use all the crossovers? any tips?