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Wavecor WF120BD05 Glass Fiber 11cm midwoofer 4 ohm View larger

Wavecor WF120BD06 Glass Fiber 11cm midwoofer 8 ohm

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Wavecor WF120BD06 Glass Fiber 11cm midwoofer 8 ohm

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The 4¾” transducers WF120BD05/WF120BD09 (4 ohm) and WF120BD06/WF120BD10 (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 WF120BD05 and WF120BD09 is the shape of the mounting flange of the frames. WF120BD06 and WF120BD10 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
      • Cone made of a new paper/glass fiber mix with improved consistency and stability
      • 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

Notes

  Parameter

WF120BD05 / WF120BD09

WF120BD06 / WF120BD10

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

3.5

3.5

[kHz]

1, 4

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

87

84

[dB]

2, 4

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

150

150

[W]

2, 4

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

 

 

[W]

2, 4

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

60

60

[W]

 

Effective radiating area, Sd

54

54

[sq.cm]

3, 4, 6

Resonance frequency (free air, no baffle), Fs

52

48

54

50

[Hz]

 

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

7.3

6.7

[g]

3

Force factor, Bxl

4.1

5.2

[N/A]

3, 4, 6

Suspension compliance, Cms

1.29

1.50

1.29

1.50

[mm/N]

3, 4, 6

Equivalent air volume, Vas

5.3

6.2

5.3

6.2

[lit.]

3, 4, 6

Mechanical resistance, Rms

0.30

0.30

0.30

0.30

[Ns/m]

3, 4, 6

Mechanical Q, Qms

7.9

7.4

7.6

7.0

[-]

3, 4, 6

Electrical Q, Qes

0.45

0.42

0.54

0.50

[-]

3, 4, 6

Total Q, Qts

0.43

0.40

0.50

0.47

[-]

4

Voice coil resistance, RDC

3.2

6.4

[ohm]

5

Voice coil inductance, Le (measured at 10 kHz)

0.087

0.16

[mH]

 

Voice coil inside diameter

32

32

[mm]

 

Voice coil winding height

12

12

[mm]

 

Air gap height

4

4

[mm]

 

Theoretical linear motor stroke, Xmax

±4

±4

[mm]

 

Magnet weight

370

370

[g]

 

Total unit net weight excl. packaging

1.05

1.05

[kg]

3, 4, 5

Krm

40

109

[mohm]

3, 4, 5

Erm

0.39

0.35

[-]

3, 4, 5

Kxm

61

145

[mH]

3, 4, 5

Exm

0.32

0.27

[-]

    • WF120BD06_10-SPL-&-IMP-resp

WF120BD05_06-outline-drawingTerminals-dimensions

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