MATERIAL:

• Cone: Paper
• Spider: Nomex
• Surround: Rubber
• Coil former: Fibreglass
• Basket: Aluminum
• Dust Cap: Fiberglass

SPECIFICATIONS:

• DC resistance (Rdc): 3,2 Ω
• Nominal impedance (ZN): 4 Ω
• Resonance frequency (fs): 26,3 Hz
• Voice coil diameter: 2,5 inch
• Mechanical Q factor (Qms): 6,03
• Electrical Q factor (Qes): 0,43
• Total Q factor (Qts): 0,4
• Moving mass (Mms): 143,8 g
• Effective piston area (Sd): 490 cm²
• Mechanical resistance (Rms): 3,9 kg/s 
• Compliance (Cms): 0,26 mm/N 
• Force factor (BL): 12,8 Tm 
• Equivalent air volume (Vas): 105,5 dm³
• SPL 2,83V/1m: 91,3 dB