Hey guys, I searched but couldnt find anyone having this specific issue. I have the Shaker 500 system, and I noticed that whenever I am listening to any songs with specifically strong bass frequencies, I get a rattle somewhere in my back speaker area. I disgarded for a while until it got really annoying the other day. So I turned my stereo on and popped the trunk open, and noticed it was the rear 5x7 area. Its actually that board that holds them in the back right behind the rear passenger's headrest.
When I laid my hand on it, the rattling went away. Anyone have this specific issue? Any ideas on how I can stop it? Thanks in advance.

 

Dynomat will fix some of it but from what i heard you can never really get rid of it but that dynomat if you use enough it should keep it down to a minimum...Crutchfield.com sells it

 

Get a couple of soft, cheap sponges, and cut them in half. Stuff them under the rear-deck board at intervals going across, making sure not to block the speakers or the LATCH system. Enjoy.