[F0RSAKEN]

I ordered 100sq/ft of Dynamat (actually one of its knockoffs). I plan on doing all four doors, and the rear cargo compartment in preparation for installing a new stereo/speakers/sub woofer. Where exactly on the doors should I apply it for best effect? I ask because in my mind, it would make sense to put it on the outer skin of the door to minimize sound bleed-through both ways, but from all the pictures I see of professional audio installs, the installer put dynamat on the innermost skin (piece the door panel clips to). How should I go about this? Thanks!