Wavecor WF120BD12

Mid Bass

Nominal diameter4.75″ / 120 mm
Resonance57.5 Hz
Q factor0.46
Sensitivity83.7 dB
Linear excursion± 3 mm
Ω°0102030405060101001 00010 000-180-120-60060120180Electrical ImpedanceElectrical Phase
mm05101520101001 00010 000Diaphragm ExcursionMaximum Linear Excursion
m/s0246810101001 00010 000Diaphragm Velocity
dB60708090100110120101001 00010 000SPL (1W, 1m, on axis)
°-180-120-60060120180101001 00010 000Acoustical phase (1m, on axis)
ms051015202530101001 00010 000Group Delay (1m, on axis)
00.51-205101520Step response
-1-0.500.51-2010203040Response to a tone burst of Hz with cycles
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
  • Sensitivity (1W, 1m, infinite baffle) SPL1W 83.7dB
  • Frequency response 57 - 4000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 57.5Hz
  • Mechanical quality factor QMS 9.30
  • Electrical quality factor QES 0.49
  • Total quality factor QTS 0.46

Large signal parameters

  • Maximum linear excursion xmax 3mm
  • Air volume displaced at xmax VD 14cm³

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 5.9Ω
  • Inductance (1kHz, estimated) LE 0.45mH
  • VC Diameter 25mm
  • Winding height HVC 10mm
  • Former material Black fiber glass

Magnet

  • Force factor Bl 5.3N/A
  • Motor constant Bl/√RE 2.18N/√W
  • Air gap height HAG 4mm
  • Diameter 90mm
  • Weight 0.44kg

Diaphragm

  • Effective diameter 78mm
  • Effective area SD 48cm²
  • Moving mass MMS 6.4g
  • Moving mass (without air load) MMD 6.1g
  • Material Kevlar/Carbon fiber

Suspensions

  • Stiffness KMS 0.833N/mm
  • Compliance CMS 1200µm/N
  • Equivalent volume to the compliance VAS 3.9L
  • Mechanical resistance RMS 0.25N·s/m

Dimensions

  • Nominal diameter 4.75
  • 120mm
  • Overall diameter 120mm
  • Baffle cutout diameter 98mm
  • Mounting depth 64mm
  • Volume occupied by the driver (estimated) 0.44L
  • Net weight 1.1kg
  • Frame material Die cast aluminum
Wavecor WF120BD12 Impedance
Wavecor WF120BD12 SPL
Wavecor WF120BD12 Dimensions

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