Size 12″ Max. Music Power (Nominal) 3,500 W (1,000 W) Frequency Response 20 Hz to 150 Hz Sensitivity (1 W/1 m) 90 dB Impedance 4 Ohm x 2 Mounting Depth 7-1/2″ Cut-Out Dimensions 11″ Recommended Enclosure 0.5 to 1.0 cu. ft. Air Suspension System Double-Stack Magnet with Double-Stack Top Plate Wide-Roll 3-Layer Fiber Radial Surround Interlaced Basalt/Carbon Fiber Reinforced IMPP Cone Cast Aluminum Basket Dual Voice Coil Brand NEW