ive got a complete kicker 15 system. it sounds the bom.BUT>>>>>everything shakes....if i dynamat it which but shall i mat down??? i herd that expanding foam is ok for som parts but which parts???? at the mo i just got tissue behind my plate......ne tipps urgent
dynamat or similar will help a lot expanding foam helps in places dynamat isn't able to be laid, like tight corners under seats and such. that black gooey stuff they use to seal the windshield in place is good for things like license plates (it's called dum-dum, and comes in a roll.) also find any loose bolts or screws and torque those down, too.