The P500-12P is a self-contained amplified subwoofer system featuring a single 12" high output subwoofer in a high output vented enclosure and a built in 500-watt class-D amplifier Designed for hatchback, sedan, and SUV applications, the P500-12P can be connected via speaker level inputs for connection to factory systems, or traditional line level inputs for aftermarket systems Featuring adjustable 12db/Octave low pass crossover, built-in adjustable bass boost EQ, hi-level/low-level inputs, built-in 0°/180° phase switch and includes Remote bass level control Precision constructed MDF ported wedge enclosure with heat activated vinyl finish, measuring H x W x D1 x D2 15" x 24.76" x 10.91" x 7.71" Famous Rockford Fosgate build quality with a full 1-year warranty The Punch 500-12P is a self-contained subwoofer enclosure with built-in amplifier. This "all in one" solution is great for systems that need extra Punch on the low-end of the frequency spectrum. The 12" high output subwoofer is impedance optimized for the built in 500-watt class-D amplifier that features a low-pass crossover, bass EQ and phase switch. You can change the amount of bass on the fly with the included remote level control. The slot port provides powerful output at lower frequencies for enhanced bass reproduction. The enclosure can be connected via speaker level inputs for connection to factory systems, or traditional line level inputs for aftermarket systems. It also features an intelligent auto turn-of/off circuit that eliminates the need for a separate turn-on wire. The enclosure itself is precision designed and constructed using MDF (Medium Density Fiberboard) for the best acoustical properties and covered with heat activated vinyl finish to resist marks. The enclosure also features a quick-release connectors for easy removal when you need extra cargo space.