i even asked best buy to hook my subs up for me when i first started with car audio and they said they wouldnt do it. they said my car was too old that they didint feel comfortable doing it. so i had to. ran into alot of problems trying to put this powerful of a system in a car thats electrical systm is from 1973. i have set up subs in about 15 newer cars (2000 and up) and it was no problem. but when you try doing it in a car like mine it is very difficult.