Rear door panel rattle with bass Options

[Kevinisyoung]

So I've swapped my rear speakers, but there's a quiet-medium loud rattle anytime there's any bass. First I tightened the metal mounting bracket for the actual speakers and that helped a lot... But it still rattles when the panels are on. I take the panels off and they sound great.

Anyone have any experience with solving this please

Not sure if the speakers physically hitting the speaker covers when they're playing loudly or if the bass is just causing the entire panel to rattle. Any way of finding out?

thx guys