does anyone know what i can to to stop the vibrations from the subs. i can tell the rear brake light located behind the back seats is moving pretty good, and i think something one the dash thats right next to the windshield. anysuggestions??

to a none related subject. has anyone cut a hole in the rear dash and put a speaker grill over it so more air will move from the trunk to the passenger area?? think it would inprove anything?