21inch 2100W rms Subwoofer

Nominal diameter 545(21) mm (in.)
Nominal impedance 8 Ω
Minimum impedance 7.8 Ω
Program power (1) 4200 W
AES Power rating(2) 2100 W
Sensitivity (3) 97.8 dB
Frequency range 33~1000 Hz
Voice coil diameter 125(5) mm (in.)
Chassis material Aluminium
Magnet material Ferrite
Magnet dimensions (ODxIDxh) 280x140x25 2pcs mm
Coil material sv
Former material Glass Fiber
Xmax(4) 17.5 mm
Xmech(5) 26 mm
Gap height 14 mm
Voice coil Winding height 42 mm

DC resistance(Re) 6 Ω
Resonance frequency(Fs) 32.6 Hz
Moving mass(Mms) 328 g
Compliance(Cms) 0.07 mm/N
Force factor(BL) 33 N/A
Mechanical Q-factor(Qms) 6.42
Electrical Q-factor(Qes) 0.39
Total Q-factor(Qts) 0.36
Equivalent air volume(Vas) 359 I
Voice coil Inductance(Le) 3.10 mH
Diaphragm area(Sd) 1750 cm2
Reference efficiency(Eta O) 3.1 %

Net weight 26.3 Kg
Multipack size (1) (W x D x H) 570x570x293 mm
Multipack weight 28.8 Kg