Wavecor WF120BD07 11 cm bass midrange 4ohm

    Wavecor WF120BD08 11 cm bass midrange 8ohm

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    Wavecor WF120BD08 11 cm bass midrange 8ohm

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    The 4¾” transducers WF120BD03 (4 ohm) and WF120BD04 (8 ohm) were designed as high performance bass and midrange units for very compact monitors and high-end hi-fi speakers.
    The only difference between WF120BD03 and WF120BD07 is the shape of the mounting flange of the frames. WF120BD04 and WF120BD08 differ in the same way.

    • 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
    • Large motor for better control and power handling
    • Vented voice coil former 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
    • 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
    • Notes

        Parameter

      WF120BD03 /
      WF120BD07

      WF120BD04 /
      WF120BD08

      Unit

      Before burn-in

      After burn-in

      Before burn-in

      After burn-in

       

      Nominal size

      [inch.]

       

      Nominal impedance

      4

      8

      [ohm]

       

      Recommended max. upper frequency limit

      4

      4

      [kHz]

      1

      Sensitivity, 2.83V/1m (average SPL in range 300 - 1,000 Hz)

      88.5

      86

      [dB]

      2

      Power handling, short term, IEC 268-5, no additional filtering

       

       

      [W]

      2

      Power handling, long term, IEC 268-5, no additional filtering

       

       

      [W]

      2

      Power handling, continuous, IEC 268-5, no additional filtering

      50

      50

      [W]

       

      Effective radiating area, Sd

      54

      54

      [sq.cm]

      3, 6

      Resonance frequency (free air, no baffle), Fs

      70

      61.5

      71.5

      63

      [Hz]

       

      Moving mass, incl. air (free air, no baffle), Mms

      6.55

      6.25

      [g]

      3

      Force factor, Bxl

      4.5

      5.5

      [N/A]

      3, 6

      Suspension compliance, Cms

      0.79

      1.03

      0.79

      1.03

      [mm/N]

      3, 6

      Equivalent air volume, Vas

      3.25

      4.25

      3.25

      4.25

      [lit.]

      3, 6

      Mechanical resistance, Rms

      0.49

      0.42

      0.49

      0.42

      [Ns/m]

      3, 6

      Mechanical Q, Qms

      5.9

      6.0

      5.7

      5.9

      [-]

      3, 6

      Electrical Q, Qes

      0.46

      0.40

      0.56

      0.49

      [-]

      3, 6

      Total Q, Qts

      0.42

      0.37

      0.51

      0.45

      [-]

      4

      Voice coil resistance, RDC

      3.2

      6.0

      [ohm]

      5

      Voice coil inductance, Le (measured at 10 kHz)

      0.086

      0.14

      [mH]

       

      Voice coil inside diameter

      26

      26

      [mm]

       

      Voice coil winding height

      12

      12

      [mm]

       

      Air gap height

      4

      4

      [mm]

       

      Magnet weight

      430

      430

      [g]

       

      Total unit net weight excl. packaging

      1.04

      1.04

      [kg]

      3, 5

      Krm

      27

      33

      [mohm]

      3, 5

      Erm

      0.43

      0.44

      [-]

      3, 5

      Kxm

      198

      430

      [mH]

      3, 5

      Exm

      0.17

      0.14

      [-]

      WF120BD04_08-SPL-&-IMP-resp
    • WF120BD07_08-outline-drawingTerminals-dimensions
    WF120BD08
    4 Items

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