Turning 9 in to 8

Well, I got tired of the center speaker blasting me out so today I unplugged it and Wow! what a difference it made in the bass and overall sound. I feel much better about the stock sound system now.

I have not taken the door panels off yet, so if someone could tell me if there is an extra wire going to the driver's door to handle the bluetooth and gps? I want to move those features to the center speaker. I feel weird talking to my door.