I just pulled out that black insulation from behind my 6x9's and replaced it with some soundkiller along the back wall and wheel well behind the speakers. The difference in sound quality was very suprising. I was thiniking of putting some egg crate foam back there as well, any suggestion as to if i should and if so how much? Thanks.

Ryam

 

What I did that helped was used a spray called road kill... It worked pretty good in the 6X9 area and in the rear hatch area...