Easy... open the door, remove 2 screws on the side of the speaker cover. It'll hang up on the clip on the inner surface, but if you pry gently, it will pull away easily. It sits right there after you remove the cover... There is a factory baffle on each... pops right out. Stuff the back when you replace with some foam or pillow stuffing. I used a set of Boston Acoustics with an adapter plate. Huge performance difference.