Rockville RVP12W8 1200w 12" Pro Subwoofers 8 Ohm Raw Sub Woofers 40 Oz Magnets Power RMS : 600 Watts (300 Watts per Subwoofer). Peak Power : 1200 Watts (600 Watts per Subwoofer). Fiber Reinforced Ultra Stiff Paper Composite Cone. Paper Composite Dust Cap Expanded and Rolled Steel Basket. Accordion Cloth Surround. Ultra Saturated, High BL Magnetic Motor Gap 2" High Temperature CCAW High SPL Voice Coil. Linear Progressive Conex Spiders. Dual Nickel Plated Banana Plug Terminals Impedance: 8 Ohms. 40 oz Magnet. Mounting Depth: 4.6" inches. Frequency Response : 35 Hz to 2 KHz. Sensitivity : 99dB @ 1w/1m Rockville RVP12W8 12&#034; 600 Watt Raw Replacement Subwoofer <span class="a-text-bold">Power RMS :</span> 600 Watts (300 Watts per Subwoofer) <span class="a-text-bold">Peak Power :</span> 1200 Watts (600 Watts per Subwoofer) Fiber Reinforced Ultra Stiff Paper Composite Cone Paper Composite Dust Cap Expanded and Rolled Steel Basket Accordion Cloth Surround Ultra Saturated, High BL Magnetic Motor Gap 2&#034; High Temperature CCAW High SPL Voice Coil Linear Progressive Conex Spiders Dual Nickel Plated Banana Plug Terminals Impedance: 8 Ohms 40 oz Magnet Mounting Depth: 4.6&#034; inches <span class="a-text-bold">Frequency Response :</span> 35 Hz to 2 KHz <span class="a-text-bold">Sensitivity :</span> 99dB @ 1w/1m REVC: 6.8 Ohm FO: 54.159 Hz SD: 530.930 sqCM BL: 11.334 TM QMS: 5.852 QES: 1.059 QTS: 0.897 NO: 0.852% SPLO: 99 dB VAS: 58.778 Ltr CMS: 140.844 uM/N KRM: 3.509 m Ohm ERM: 0.840 MMS: 58.809 g MMD: 51.775 KXM: 31.625 m Ohm EXM: 0.676