im glad i never had the mach system in my car lol. i was thinking why dont you leave the mach in and use those amps to power just the front speaker like 1 amp per speaker and run aftermarket speakers so then it will run at 4ohms. then get a 2ch amp and run it to the back speakers and then a mono amp for your 2 big 12's thats a good setup if you want to keep the mach in. i think this would work if not someone say dont do it. if not take all that crap out add a 4ch amp and 4 new speaker and a new deck and some subs. youll be so muched pleased i love my setup and its still not enough
