Jensen JP12 12" Front Firing Powered Subwoofer, 130 Watts RMS (Discontinued by Manufacturer) 33 to 150 Hz frequency response for house-shaking bass; uses 12-inch poly-cone driver with durable foam surround Continuously variable 50 to 150 Hz crossover lets you tailor the output to your other speakers 125 watts RMS with 10 percent THD Spring-clip speaker-level inputs and outputs plus 1 line-level RCA input for direct LFE (low-frequency effects) signals from youre a/V receiver Measures 17.75 x 15.25 x 16 inches (W x H x D)