i have a 2006 chevy HHR, it still has the stock radio, speakers, amplifier and subwoofer in it. all of this is stock. i want to hook up an aftermarket amp and sub, while still keeping the stock radio. I was told that some newer car radios have preamp rca outputs built into them. so does the radios in the 2006 chevy hhr have RCA outputs for the aftermarket amp to connect to? or do i need to get a factory system adapter? if i need to get an adapter, which one would i need to get so i can hook up the amp?
