The Punch P500-12P is an "all in one" solution for adding serious bass to Hatchbacks, Sedans, and SUVs. This model features a 12" high output woofer with a 500-watt internal amplifier and a high output vented enclosure that can be connected via speaker level inputs to factory systems, or traditional line level inputs for aftermarket systems. The enclosure features quick release input and power connectors for easy removal when extra space is required. The "Closed-loop" design ensures optimum performance between woofer, amplifier and enclosure and the slot port provides powerful output at lower frequencies for enhanced bass reproduction. This "all in one" solution is great for systems that need extra Punch on the low-end of the frequency spectrum.