18'' 1600w horn-loaded subwoofer speaker - SP18-125)

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