Features: Rockville RVP12W8 12" 600 Watt Raw Replacement Subwoofer. Power Rating :. 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. 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. TS Parameters:. . Xmax: 6MM. Fs: 38.678Hz. Qms: 3.08. Cms: 458.637. Bl: 7.153. Zmin: 7.8. Re: 6.5. Qes: 1.192. Mms: 36.919. dBspl: 91.4. L1kHz: 0.65mH. Sd: 53.093. Qts: 0.86. Rms: 5.85. VAS: 183.583. L10kHz: 280 um