I find that too. Also, when I put my 1 12in RF sub behind my driver seat, it hit ALOT cleaner and sounded ALOT better to me than when it was behind my passeneger seat. Crazy truck. Also, if my sub is BLASTING inside the truck, you can barely hear it outside the truck. If I park in the garage and blast the sound, you can barely hear it outside 2 feet of the door, but the pictures rattle on the wall of my house. *Rolls Eyes*