If you are in need of a shallow mount subwoofer, then look no further that the JL Audio 13TW5v2-4. This new and unique thin-line sub is going to give you the most sound out of the smallest space. The DMA-optimized motor system will produce a consistent motor force over a long range of strokes and power levels. U.S. Patented Floating Cone Attach Method (FCAM) aligns the cone and surround without depending on the spider and coil assembly, resulting in an improved pistonic motion. Even with all the advanced technology that JL Audio uses, the best feature is still its mounting depth. The 13TW5v2-4 only requires 2-5/8″ inches of space to mount. You are only 2-1/2″ away from the greatest sounding shallow mount subwoofer you have heard.