SPECIFICATIONS:
DC resistance (Rdc):
3,5 Ω
Nominal impedance (ZN):
4 Ω
Resonance frequency (fs):
31,2 Hz
Voice coil diameter:
2 inch
Mechanical Q factor (Qms):
5,64
Electrical Q factor (Qes):
0,35
Total Q factor (Qts):
0,33
Moving mass (Mms):
96,5 g
Effective piston area (Sd):
366 cm²
Mechanical resistance (Rms):
5,1 kg/s 
Compliance (Cms):
0,25 mm/N 
Force factor (BL):
14,1 Tm 
Equivalent air volume (Vas):
51 dm³
SPL 2,83V/1m:
91,5 dB