18'' 1600w horn-loaded subwoofer speaker

Nominal Diameter 18 inch Rated Impedance 8 ohm Nominal Power handling1 800 Watts Program Power2 1600 Watts Sensitivity(lw/lm)3 99 dB Frequency Range4 35~1600 Hz Minimum Impedance(Zmin) 7.7 ohm Voice Coil Diameter 5 inch Voice Coil Material Copper Cald Aluminum(Inside/Outside) Former Material Fiberglass Voice Coil Winding Depth 25 mm Number of layers 2 Magnet gap depth 12 mm Basket Cast Aluminum Flux Density 1.1 T Magnet Material Ceramic Thiele-Small parameters Resonance frequency Fs 35 Hz DC resistance Re 5.6 ohm Mechanical factor Qms 10.7 Electrical factor Qes 0.26 Total factor Qts 0.25 Mechanical compliance Cms 0.11 mm/N Mechanical resistance of suspension losses Rms 3.8 mechk-ohm Effective Moving Mass Mms 185 gr Half-space efficiency Eff 4.4 % BL Factor BL 30 T.m Equivalent Cas air load Vas 271 liters Effective piston area Sd 0.132 m2 Max.linear excursion5 Xmax 9.5 mm Voice coilinductance LelK 1.71 mH Efficiency Bandwidth Product EBP 135 mH Mounting Information Overall Diameter 477 mm Bolt Circle Diameter 451.5 mm Bolt Hole Diameter 6.5 mm Baffle Cutout Diameter 427 mm Overall Depth 202 mm Net Weight 19 kg Shipping Weight 21.7 kg Shipping Box 500x500x240 mm