Originally Posted by
trickyrix
Are you sure it's the speakers that are rattling? I had a nasty rattle in my passenger door that I isolated as the window-winder mechanism (I have manual windows). The fix is to pull out the gearbox behind the winder, open it up, and pack it with grease. There are springs inside that box that will rattle like a mofo unless they're damped. I wasn't able to pack the gearbox to capacity, but I got enough in it to quell the rattle for a while.
Yes, it's rattling again, but at least I know the source of the racket.