Wavecor WF120BD08 Paper 8 OHM

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The 4¾” transducer WF120BD08 (8 ohm) is designed as high performance bass and midrange units for very compact monitors and high-end hi-fi speakers.

  • Balanced Drive motor structure for optimal drive force symmetry resulting in largely reduced even order harmonic distortion
  • Copper cap on center pole to reduce voice coil inductance and to minimize variations in voice coil inductance as a function of voice coil position
  • Black coated semi-air-dried paper cone
  • Rigid die cast alu chassis with extensive venting for lower air flow speed reducing audible distortion
  • Vented voice coil former for reduced distortion and compression
  • Vented center pole with dual flares for reduced noise level at large cone excursions
  • Heavy-duty black fiber glass voice coil former to reduce mechanical losses resulting in better dynamic performance and low-level details
  • Large motor with 1¼” voice coil diameter for better control and power handling
  • Built-in alu field-stabilizing ring for reduced distortion at high levels
  • Low-loss suspension (high Qm) for better reproduction of details and dynamics
  • Black motor parts for better heat transfer to the surrounding air
  • Conex spider for better durability under extreme conditions
  • Gold plated terminals to ensure long-term trouble free connection

Short data

Usage as Bass-Midrange
Power Handling 50 Watt
Impedance 8 Ohm
Frequency from 70 Hz
Max. Frequency 4 kHz
Sound pressure 86 dB


Overall dimensions 120.5 mm
Baffle cutout 99 mm
Depth (Total) 66 mm
Frame Material Aluminium diecast
Membrane Type Cone
Membrane Material Paper coated
Voice coil Ø 26 mm
Voice coil height 12 mm
Voice coil material Fibreglass
Air gap height 4 mm
Magnet Ø 90 mm
Magnet-weight 430 g


Resonance fs fs: 71.5 Hz
Mechanical Q Qms: 5.9
Electrical Q Qes: 0.49
Total Q Qts: 0.45
Equivalent Air-Volumen Vas: 4.25 Liter
DC-Resistance Re: 6.0 Ohm
Coil Inductance Le: 0.14 mH
Mech. Compliance Cms: 1.03 mm/N
Moving Mass Mms: 6.25 g
mech. Resistance Rms: 0.42 kg/s-¹
Max. Excursion +/- Xmax: 4 mm
BL Product Bl: 5.5 N/A
Membrane Area Sd: 54 cm²
Sound pressure dB: 86 SPL

Impedance and Frequency

Technical Drawing

PDF-Product information

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