2004 Bose sytem, just wish to add a hi-low converter so i can rca to an amp for a JL 12w3 without losing any functions to system or interfere with the onstar. have heard several diff. stories of peripherals for this and that, also heard you can grab Bose sub amp output somewhere?
anyone have a 2004 Bose system and just added a sub? any and all help would be appreiciated