by Law4you » Thu Aug 23, 2007 8:01 pm
I could have to know what kind of car you have.. but no you do not have to change out the head unit.. my wife has a Monte Carlo with the Bose system. I used a high to low converter, but with this system, the louder you turn up the radio, the reduce the bass gets.. it could be best to change out the head unit for one with sub control..