This VEGA PRO series exceptional 12-inch size woofer offers value and performance there is nothing close to! VEGA PRO * Proprietary Stamped Cast Basket Design * Optimized High Power Double-Stacked Motor Structure * Vented Pole Piece and Voice Coil Gap for Maximum Cooling * Proprietary Horizontal Mounted Terminal with Integrated Impedance Selector * High Power Stitched Tensile Leads Embedded in Double Progressive Spiders * Black Santoprene Double Stitched Surround for Ultimate Reliability * Power Handling: 750W / 1500W. * Sensitivity (dB @ 1W 1M): 85.3dB. * Mounting Diameter: 10.7" (272mm). * Mounting Depth: 5.98" (152mm). * Sealed Enclosure Volume: 1.25 ft3 35.4 litres. * Vented Enclosure Volume: 1.50 ft3 42.450 litres. * Vent Dimensions: 1.625" x 13.5" x 27 "/ 41mm x 343mm x 686mm .