CERWIN VEGA HEDBK212 12-Inch Subwoofer Enclosure Kit 12" HED Series Dual Subwoofer Enclosure with Amplifier Subwoofers (HED124) x 2 Peak: 300 watts RMS: 150 watts Impedance: 4-Ohm Slot ported subwoofer design for extreme bass output High-grade carpet with custom-stitched embroidery Factory-tuned 2-Channel HED Series Car Amplifier 40 watts RMS x 2 channels at 4 Ohm 75 watts RMS x 2 channels at 2 Ohm