i just got done installing 2 - 12" pioneer subs w/ 1000 watt Kenwood amp. i am running a pioneer deh-4500mp head unit that pushes 200watt, but ... in my trunk i am curious how to make it sound better my trunk rattles a lot is there something that i cam make it stop rattling as much and make a more cleaner bass sound? i hear if i stick foam between the space in the trunk lid it will help reduce this is that the best rough?