Just curious how you got that one done. I use the wires already run to the doors and back dash to install my music system and just bypassed the factory amp and spliced into the wires from the trunk however I STILL had to run a seperate wire from the head unit to the actual sub. So I still to take out rear seats etc. Would like to know for when I upgrade my music system again. Currently running just one amp for the 2 750 w 12" kickers in the back. Would like to add a seperate amp for the highs and mids