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Nominal Diameter 10 inch Rated Impedance 8 ohm Nominal Power handling1 250 Watts Program Power2 500 Watts Sensitivity(lw/lm)3 95 dB Frequency Range4 56~4.2K Hz Minimum Impedance(Zmin) 7.1 ohm Voice Coil Diameter 2.5 inch Voice Coil Material Copper Former Material Glass Fiber Voice Coil Winding Depth 16 mm Number of layers 2(Inside/Outside) Magnet gap depth 9 mm Basket Cast Aluminum Flux Density 1.1 T Magnet Material Ceramic