Anyone ever put a XL in a 4th order? I put (1) XL 15" cause I wanted to hit some of those low lows. Mainly because I like to listen to DECAF mixes. This box is killing my hatch, I had to remove my back glass wiper arm, because it murdered the gasket. It got to the point that you couldn't hear the music cleanly due to the rattling. After removing the wiper arm and the motor, clean music lasted for about 3 weeks. Then the rear lift gate flexed so much that it broke the center support, part of its structural support. It broke it in half which was about 3 inch's wide. XL is mean I can't wait for two.