Technical data 

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