I made a plywood spacer on the first door that fits between the door panel and the door skin. When I put the speaker in for good I will drill the plywood out and use long enough sheet metal screws to screw into the door skin and suck the panel tight against it so hopefully it wont vibrate. I moved to the other rear door and got the new glass channel in it and the window all back in. Had to hook a battery to it and test it out, success!!
https://www.youtube.com/watch?v=_2gj...ature=youtu.be