I'm new here I have a question about the mach 460 system. I put a wiring harness and a head unit in my car a few years ago due to the factory one being bad. I never could get any thing to play but the tweeters, so now I want to replace all the factory speakers with after market units and after market amps. I still want to be able to use the factory wiring thats in the car to power my amp and to run my speakers. Thanks for any help