I have an 03 mustang but i dont have the mach system. I have slightly upgraded speakers but i have a huge sound system that runs on 2 amps! I have 2 12 inch alpind type r's so as you can imagine my speakers just dont sound good...i like the mach system and i also want the front door speakers that go next to the left/right rearview mirrors...is there any way i can hook all of this? i am pretty electronically savy, i did all of the other system work myself...suggestions???

 

you don't want to add the mach stuff if you have already started replacing the factory pieces with aftermarket stuff, it will not sound good.