Cadence Acoustics XWB12F 700-Watt Peak 4-Ohm Passive Subwoofer Enclosure Cadence XWB12F single 12" passive subwoofer enclosure Power Handling: 360W RMS/700W Peak Frequency Response: 35Hz - 500Hz Sensitivity: 90dB @ 1w/1m SPL Dimensions (W x D x H): 22" x 16" x 16"