This might sound a little silly.. I just installed an amplifier and a prefab sub box in the trunk. However, now I feel like the in car speakers need an amp. I have all around aftermarket speakers because I had some blown speakers when I bought the car, including i've had speakers wired into the doors (my car had empty speaker grilles at the doors when I got it too..) I would like to install another amplifier and I'm not really sure how to do this. I ran some pretty thicked gauge wire for the subs, now how do I go about an amplifier for the in car speakers??