JBL S2-1024SS SERIES II 1000 WATTS 10" SELECTABLE 2 OR 4 OHM SUBWOOFER ENCLOSURE Power Handling: Peak: 1000 watts RMS: 250 watts Nominal Impedance: Single 2 or 4 ohm Frequency Response: 30 ~ 175 Hz Sensitivity: 92 dB Dimensions (Approx): 22-1/2" W x 15-3/16" H x 12-7/16" D