 |
 |
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
- Balanced Drive motor structure for optimal drive force symmetry resulting in largely reduced 2nd 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
- 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 39 mm 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
|
|
|
|
FREQUENCY RESPONSE
|
|
|
|
NOMINAL SPECIFICATIONS
|
|
|
|
|
Notes
|
Parameter
|
WF182BD03 / WF182BD07
|
WF182BD04 / WF182BD08
|
Unit
|
|
Before burn-in
|
After burn-in
|
Before burn-in
|
After burn-in
|
|
|
Nominal size
|
7
|
7
|
[inch.]
|
|
|
Nominal impedance
|
4
|
8
|
[ohm]
|
|
|
Recommended max. upper frequency limit
|
2.5
|
2.5
|
[kHz]
|
|
1
|
Sensitivity, 2.83V/1m (average SPL in range 200 - 1,000 Hz)
|
91
|
88
|
[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
|
80
|
80
|
[W]
|
|
|
Effective radiating area, Sd
|
131
|
131
|
[sq.cm]
|
|
3, 6
|
Resonance frequency (free air, no baffle), Fs
|
39
|
33.8
|
40
|
33.4
|
[Hz]
|
|
|
Moving mass, incl. air (free air, no baffle), Mms
|
16.7
|
16.1
|
[g]
|
|
3
|
Force factor, Bxl
|
6.75
|
8.5
|
[N/A]
|
|
3, 6
|
Suspension compliance, Cms
|
1.0
|
1.33
|
1.0
|
1.33
|
[mm/N]
|
|
3, 6
|
Equivalent air volume, Vas
|
24.4
|
32.4
|
24.4
|
32.4
|
[lit.]
|
|
3, 6
|
Mechanical resistance, Rms
|
0.37
|
0.43
|
0.37
|
0.43
|
[Ns/m]
|
|
3, 6
|
Mechanical Q, Qms
|
11
|
8.2
|
10.9
|
8.1
|
[-]
|
|
3, 6
|
Electrical Q, Qes
|
0.30
|
0.26
|
0.35
|
0.30
|
[-]
|
|
3, 6
|
Total Q, Qts
|
0.29
|
0.25
|
0.34
|
0.29
|
[-]
|
|
4
|
Voice coil resistance, RDC
|
3.3
|
6.3
|
[ohm]
|
|
5
|
Voice coil inductance, Le (measured at 10 kHz)
|
0.088
|
0.14
|
[mH]
|
|
|
Voice coil inside diameter
|
39
|
39
|
[mm]
|
|
|
Voice coil winding height
|
16
|
16
|
[mm]
|
|
|
Air gap height
|
5
|
5
|
[mm]
|
|
|
Magnet weight
|
885
|
885
|
[g]
|
|
|
Total unit net weight excl. packaging
|
2.3
|
2.3
|
[kg]
|
|
3, 5
|
Krm
|
33
|
54
|
[mohm]
|
|
3, 5
|
Erm
|
0.42
|
0.40
|
[-]
|
|
3, 5
|
Kxm
|
157
|
347
|
[mH]
|
|
3, 5
|
Exm
|
0.19
|
0.14
|
[-]
|
|
|
|
|
|
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 20 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 10/14.1 VRMS (4/8 ohm version). The unit is not burned in before shipping.
|
|
|
|
|
OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)
|
|
|
|
|
|
|
Part no. WF182BD03-01
|
4 ohm version, individual packaging (one piece per box)
|
|
Part no. WF182BD03-02
|
4 ohm version, bulk packaging
|
|
Part no. WF182BD04-01
|
8 ohm version, individual packaging (one piece per box)
|
|
Part no. WF182BD04-02
|
8 ohm version, bulk packaging
|
|
Part no. WF182BD07-01
|
4 ohm version, truncated frame, individual packaging (one piece per box)
|
|
Part no. WF182BD07-02
|
4 ohm version, truncated frame, bulk packaging
|
|
Part no. WF182BD08-01
|
8 ohm version, truncated frame, individual packaging (one piece per box)
|
|
Part no. WF182BD08-02
|
8 ohm version, truncated frame, bulk packaging
|
|
|
|
|
Latest update: August 9, 2022
|
|
|
|
|
|
|
|
Specifications are subject to change without any further notice.
Copyright © 2006-2022 by Wavecor Ltd., China. All rights reserved.
|
|
|
|
|
|
MORE INFO
|
|
|
|
|
|
