The innovative, compact, space-saving enclosure design makes it easy for the UD-SW250T to be installed freely in a variety of automobile trunk spaces or inside pickup truck cabins. The UD-SW250T is constructed from high-quality, sturdy 5/8" MDF and includes internal bracing for strength and bass clarity. The exterior is covered in black carpet. Heavy-duty Ni-Cr push-type terminals make connection to the amplifier a snap. Compatible with the Pioneer TS-SW2502S4 10" shallow subwoofer (sold separately).