98 civic EX deck rattle
 

I have a 1998 Civic EX 2-door, and the plastic panel over the rear speakers,
along with the panels by the rear seats, rattles incessantly when there's
any kind of bass. I only have Alpine 6x9's, and I had the same problem with
the factory speakers. Short of putting Dynamat through the whole damn car,
does anyone have a suggestion for making the ghetto rattle stop?