some time it does matter not saying it's not cool. there are ways to set up a car for show most of you know if all you got is junk it not going to fly. as a perfect car the system.the one i am working on has 3 different brands mid/ higs amps head units and subs mite all be different all 6 mids high are the same as subs the amps and hu are different brands but the amps are all the same brand. your right it a pain getting it all have not decided on wire and rca's yet. still trying to find every thing. now for spl it what ever you want. of coures you not going to show off to many spl systems. most of all with cement in the doors