hey, I am trying to figure out if I have the BOSE system. I assume it is because I have subwoofer in the rear deck. 2nd question: What kind of freeair subs have you guys replaced the factory one with? I want to put a decent replacement in there. the battery in under the rear seat, correct? will the amp power wire run from there of the connectors under the hood? the remote turn-on lead comes from the head unit or can the signal be taken from the old conector for the factory sub? THANKS!