The 3½" transducers WF090WA01 (4 ohm) and WF090WA02 (8 ohm) were designed especially for high quality multimedia and lifestyle speakers, where small size is required while still obtaining sound reproduction without compromises.
- Vented voice coil former for reduced distortion and compression
- Vented chassis for lower air flow speed reducing audible distortion
- Voice coil wound with Copper Clad Aluminium Wire for higher efficiency and better dynamics
- Heavy-duty black fiber glass voice coil bobbin to increase power handling and reduce mechanical losses resulting in better dynamic performance and low-level details
- Low-loss suspension (high Qm) for better reproduction of details and dynamics
- Black magnet parts for better heat transfer to increase power handling
- Progressive suspension with specially designed CONEX damper (spider) for long durability under extreme operating conditions
- Gold plated terminals to prevent oxidation for long-term reliable connection
- Delivered with foam gasket attached for hassle-free mounting and secure cabinet sealing
Notes
Parameter
WF090WA01
WF090WA02
Unit
Before burn-in
After burn-in
Before burn-in
After burn-in
Nominal size
3½
3½
[inch.]
Nominal impedance
4
8
[ohm]
Recommended max. upper frequency limit
5
5
[kHz]
1, 5
Sensitivity, 2.83V/1m (average SPL in range 300 - 4,000 Hz)
86.5
84
[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
[W]
Effective radiating area, Sd
36
36
[sq.cm]
3, 5, 7
Resonance frequency (free air, no baffle), Fs
115
109
117
110
[Hz]
Moving mass, incl. air (free air, no baffle), Mms
3.45
3.35
[g]
3
Force factor, Bxl
2.9
3.5
[N/A]
3, 5, 7
Suspension compliance, Cms
0.55
0.62
0.55
0.62
[mm/N]
3, 5, 7
Equivalent air volume, Vas
1.02
1.14
1.02
1.14
[lit.]
3, 5, 7
Mechanical resistance, Rms
0.39
0.39
0.39
0.39
[Ns/m]
3, 5, 7
Mechanical Q, Qms
6.4
6.1
6.3
6.0
[-]
3, 5, 7
Electrical Q, Qes
0.92
0.87
1.11
1.04
[-]
3, 5, 7
Total Q, Qts
0.81
0.76
0.94
0.89
[-]
4
Voice coil resistance, RDC
3.1
5.5
[ohm]
6
Voice coil inductance, Le(measured at 10 kHz)
0.14
0.22
[mH]
Voice coil inside diameter
22
22
[mm]
Voice coil winding height
8.5
8.5
[mm]
Air gap height
3
3
[mm]
Theoretical linear motor stroke, Xmax
±2.75
±2.75
[mm]
Magnet weight
135
135
[g]
Total unit net weight excl. packaging
0.34
0.34
[kg]
3, 6
Krm
[mohm]
3, 6
Erm
[-]
3, 6
Kxm
[mH]
3, 6
Exm
[-]
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