Originally Posted by crazy_urn
If your trunk liner is moving with 2 12"s on it, it probably is your driving that is the problem.
i have 1 10" in a sealed box and have no movement issues. but I also have a bit of dynamat back there. you might want to give that a try. it solved some rattle issues I was having.
Its not that it rattles its the fact the carpet moves all around. poor design on fords side i guess. i'll figure a way of securing it