rattling

hey, I just installed 2 subs in my 97blazer(which sound awesome:evillol:) and was wondering if anyone knows how to stop or at least quiet the rear hatch? it vibrates soooo much. :banghead: would dynamat help? any info would help

If the bx is right against the gate place a piece of foam between the box and the gate.
You can probably stuff the foam into a matching pillow case or something if it works