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): 29,2 Hz
Voice coil diameter: 2,0 inch
Mechanical Q factor (Qms): 4,32
Electrical Q factor (Qes): 0,41
Total Q factor (Qts): 0,37
Moving mass (Mms): 113,2 g
Effective piston area (Sd): 490 cm²
Mechanical resistance (Rms): 0,63 kg/s
Compliance (Cms): 0,31 mm/N
Force factor (BL): 12,2 Tm
Equivalent air volume (Vas): 112,1 dm³
SPL 2,83V/1m: 92,2 dB