I currently have a pioneer P88rsII headunit, got alpine type X 17Pro Components ans Alpine Type R SPR17 Coax at front running off alpine PDX 4.100 AMP Then i currently now have 2X 12" Alpine Type R Subs Each powered by Alpine PDX 1.1000 Amps 2 Ground Zero 1Farad power Caps All running off yellow top battery, I have 2 Alpine Type X subs which Drained my Car And pounded it too much, too powerfull for a daily driver syestem so stuck with type Rs and Sold the X's at a Loss. I have a collection of head units, all pioneer, used alpine, which you can tweek alot but look very dated to my liking.