The 6” transducers WF152BD05 (4 ohm) and WF152BD06 (8 ohm) were designed as high performance bass and midrange units for 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
- 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
WF152BD05
WF152BD06
Unit
Before burn-in
After burn-in
Before burn-in
After burn-in
Nominal size
6
6
[inch.]
Nominal impedance
4
8
[ohm]
Recommended max. upper frequency limit
3
3
[kHz]
1, 4
Sensitivity, 2.83V/1m (average SPL in range 300 - 1,000 Hz)
90
87
[dB]
2, 4
Power handling, short term, IEC 268-5, no additional filtering
[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
70
70
[W]
Effective radiating area, Sd
93
93
[sq.cm]
3, 4, 6
Resonance frequency (free air, no baffle), Fs
50
44.5
51.5
46
[Hz]
Moving mass, incl. air (free air, no baffle), Mms
13.5
12.8
[g]
3, 4
Force factor, Bxl
6.35
8.0
[N/A]
3, 4, 6
Suspension compliance, Cms
0.75
0.94
0.75
0.94
[mm/N]
3, 4, 6
Equivalent air volume, Vas
9.2
11.5
9.2
11.5
[lit.]
3, 4, 6
Mechanical resistance, Rms
0.41
0.46
0.41
0.46
[Ns/m]
3, 4, 6
Mechanical Q, Qms
10.3
8.2
10.1
8.0
[-]
3, 4, 6
Electrical Q, Qes
0.34
0.30
0.41
0.36
[-]
3, 4, 6
Total Q, Qts
0.33
0.29
0.39
0.35
[-]
4
Voice coil resistance, RDC
3.2
6.3
[ohm]
5
Voice coil inductance, Le (measured at 10 kHz)
0.11
0.19
[mH]
Voice coil inside diameter
32
32
[mm]
Voice coil winding height
14
14
[mm]
Air gap height
5
5
[mm]
Theoretical linear motor stroke, Xmax
±4.5
±4.5
[mm]
Magnet weight
550
550
[g]
Total unit net weight excl. packaging
1.44
1.44
[kg]
3, 4, 5
Krm
51
74
[mohm]
3, 4, 5
Erm
0.40
0.41
[-]
3, 4, 5
Kxm
114
195
[mH]
3, 4, 5
Exm
0.29
0.28
[-]
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