Marty where do the negative runs all work their way to?
Like Wolverine said, sound deadening is a great investment, and will make even mediocre speakers sound decent. If you're worried about the extra weight slowing you down (like I was), Marty's reply was to 'eat less kebabs' :sorcerer:
You can deaden just 'half' the door, still to good effect. Pics below are more of Marty's handiwork, on my old car. Note that the stock speaker mounts were retained, but a diffuser pad and new speaker wiring was still used.