12'' 500W loudspeaker (DM12-65)

General Specifications Nominal Diameter 12 inch Rated Impedance 8 ohm Nominal Power handling1 250 Watts Program Power2 500 Watts Sensitivity(lw/lm)3 94 dB Frequency Range4 46~3500 Hz Minimum Impedance(Zmin) 7.9 ohm Voice Coil Diameter 2.5 inch Voice Coil Material Copper Former Material Aluminum Voice Coil Winding Depth 23 mm Number of layers 2 Magnet gap depth 8 mm Basket Cast Aluminum Flux Density 1.2 T Magnet Material Ceramic Thiele-Small parameters Resonance frequency Fs 46 Hz DC resistance Re 6.0 ohm Mechanical factor Qms 2.9 Electrical factor Qes 0.46 Total factor Qts 0.39 Mechanical compliance Cms 0.16 mm/N Mechanical resistance of suspension losses Rms 7.44 mechk-ohm Effective Moving Mass Mms 75 gr Half-space efficiency Eff 1.42 % BL Factor BL 16.8 T.m Equivalent Cas air load Vas 71 liters Effective piston area Sd 0.056 m2 Max.linear excursion5 Xmax 9 mm Voice coilinductance LelK 1.52 mH Efficiency Bandwidth Product EBP 100 mH Mounting Information Overall Diameter 313 mm Bolt Circle Diameter 294 mm Bolt Hole Diameter 6.5 mm Baffle Cutout Diameter 279 mm Overall Depth 155 mm Net Weight 6.5 kg Shipping Weight 8.3 kg Shipping Box