Rockville SBG1154 800 Watt Passive 4-Ohm Pro DJ Subwoofer, MDF/Pole Mount, 15 inch Rockville SBG1154 15" 800 Watt Passive Pro DJ Subwoofer w/ MDF Cabinet and Pole Mount. 15" Pro audio woofer. 400 Watts RMS / 600 Watts Program / 800 Watts Peak. 3" High temperature aluminum voice coil. 70 oz magnet woofer. Ported Enclosure for Improved Bass Response. Construction: High-Density, High-Quality Non Resonant MDF wood - Stapled, Bonded & Braced. Ergonomic Recessed Handles. Molded Steel Grill. Aviation Grade Black Carpet. Pole Mount. Rubber Isolating Feet. Binding Post / Banana Plug Terminals (Negative/Positive). 1/4" Jack (In/Out). SpeakON (In/Out). All input/output connections are internally connected in parallel. Nominal Impedance: 4 Ohm. Sensitivity: 94dB @ 1w/1m. Frequency Response: 20Hz - 500Hz. Dimensions (W x D x H): 18" x 17" x 20". Weight: 44 lbs.