 |
 |
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NOMINAL SPECIFICATIONS
|
|
|
|
|
Notes
|
Parameter
|
WF120BD05 / WF120BD09
|
WF120BD06 / WF120BD10
|
Unit
|
|
Before burn-in
|
After burn-in
|
Before burn-in
|
After burn-in
|
|
|
Nominal size
|
4.75
|
4.75
|
[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
|
[-]
|
|
|
|
|
|
Note 1
|
Measured in infinite baffle.
|
|
Note 2
|
Tested in free air (no cabinet).
|
|
Note 3
|
Measured using a semi-constant current source, nominal level 2 mA.
|
|
Note 4
|
Measured at 25 deg. C
|
|
Note 5
|
It is generally a rough simplification to assume that loudspeaker transducer voice coils exhibit the characteristics of an inductor. Instead it is a far more accurate approach to use the more advanced model often referred to as the “Wright empirical model”, also used in LEAP-4 as the TSL model (www.linearx.com), involving parameters Krm, Erm, Kxm, and Exm. This more accurate transducer model is described in a technical paper (PDF) here.
|
|
Note 6
|
After burn-in specifications are measured 12 hours after exiting the transducer by a 20 Hz sine wave for 2 hours at level 7.75/11 VRMS (4/8 ohm version). The unit is not burned in before shipping.
|
|
|
|
|
OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)
|
|
|
|
|
|
|
Part no. WF120BD05-01
|
4 ohm version, round, individual packaging (one piece per box)
|
|
Part no. WF120BD05-02
|
4 ohm version, round, bulk packaging
|
|
Part no. WF120BD06-01
|
8 ohm version, round, individual packaging (one piece per box)
|
|
Part no. WF120BD06-02
|
8 ohm version, round, bulk packaging
|
|
Part no. WF120BD09-01
|
4 ohm version, truncated, individual packaging (one piece per box)
|
|
Part no. WF120BD09-02
|
4 ohm version, truncated, bulk packaging
|
|
Part no. WF120BD10-01
|
8 ohm version, truncated, individual packaging (one piece per box)
|
|
Part no. WF120BD10-02
|
8 ohm version, truncated, bulk packaging
|
|
|
|
|
Latest update: December 3, 2014
|
|
|
|
|
|
|
|
Specifications are subject to change without any further notice.
Copyright © 2006-2022 by Wavecor Ltd., China. All rights reserved.
|
|
|
|
|
|
MORE INFO
|
|
|
|
|
|
