Material
Cone: Paper
Spider: Nomex
Surround: Rubber
Coil former: Aluminium
Basket: Steel
Dust Cap: PP

Specifications
DC resistance (Rdc): 3,2 Ω
Nominal impedance (ZN): 4 Ω
Resonance frequency (fs): 31,3 Hz
Voice coil diameter: 2,0 inch
Mechanical Q factor (Qms): 5,51
Electrical Q factor (Qes): 0,40
Total Q factor (Qts): 0,37
Moving mass (Mms): 67,2 g
Effective piston area (Sd): 366 cm²
Mechanical resistance (Rms): 2,3 kg/s
Compliance (Cms): 0,34 mm/N
Force factor (BL): 10,2 Tm
Equivalent air volume (Vas): 63,6 dm³
SPL 2,83V/1m: 92,1 dB