Polk Audio db1222 Dual 12" Loaded db Series Hatchback Ported Subwoofer Enclosure with Grilles A dual enclosed slot vented MDF trapezoid subwoofer speaker Equipped with two 12-inch Dynamic Balance polymer composite cones Frequency response: 27-200 Hz Power handling: 720 watts continuous, 1440 watts peak Equipped with a Klippel optimized component using a state-of-the-art Klippel Distortion Analyzer