I have 2 12' Kickers in my trunk in a custom built box. Also have a kicker amp. I find my amp rattling pretty bad because its mounted on top of my box, where would be a better place to mount it?Also, my trunk rattles pretty bad, would puttin something under my box that was not a conductor of the vibrations help any? Or does anyone have any better suggestions to stop the rattling.I drive a 01 Jeep Grand Cherokee. They are obviously located in my trunk. Thanks!