Kicker 51PDFT10 Powered Car Subwoofer, 10 inches — Compact Enclosure with Built-In 100 watts (RMS at 14.4v) Amp

Space-saving enclosure designed to tuck under or behind most vehicle seats or fit in trunks. The award-winning 10-inch KICKER subwoofer delivers deep, extended bass response. A high-efficiency Class-D power amplifier is integrated into the enclosure and provides 100 watts (RMS at 14.4v). For easy tuning and improved sound control the unit includes a 0-180° phase switch and a +6dB KickEQ™ bass boost.