 |
 |
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
 New optimized glass fibre cone design- Rigid steel chassis with extensive venting for lower air flow speed reducing audible distortion
- Vented center pole with dual flares for reduced noise level at large cone excursions
- Vented voice coil former
- Heavy-duty fiber glass voice coil former to reduce mechanical losses resulting in better dynamic performance and low-level details
- Large motor structure 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 plated 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
- Delivered with foam gasket attached for hassle-free mounting and secure cabinet sealing
|
|
|
|
FREQUENCY RESPONSE
|
|
|
|
SPECIFICATIONS
|
|
|
|
|
Notes
|
Parameter
|
WF118WA05
|
WF118WA06
|
Unit
|
|
Before burn-in
|
After burn-in
|
Before burn-in
|
After burn-in
|
|
|
Nominal size
|
4.5
|
4.5
|
[inch.]
|
|
|
Nominal impedance
|
4
|
8
|
[ohm]
|
|
|
Recommended max. upper frequency limit
|
4
|
4
|
[kHz]
|
|
1, 3
|
Sensitivity, 2.83V/1m (average 400-4,000 Hz)
|
87.5
|
84.5
|
[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
|
50
|
50
|
[W]
|
|
|
Effective radiating area, Sd
|
54
|
54
|
[sq.cm]
|
|
3, 6
|
Resonance frequency (free air, no baffle), Fs
|
65
|
|
66
|
|
[Hz]
|
|
|
Moving mass, incl. air (free air, no baffle), Mms
|
7.1
|
6.9
|
[g]
|
|
3
|
Force factor, Bxl
|
4.3
|
5.6
|
[N/A]
|
|
3, 6
|
Suspension compliance, Cms
|
0.84
|
|
0.84
|
|
[mm/N]
|
|
3, 6
|
Equivalent air volume, Vas
|
3.5
|
|
3.5
|
|
[lit.]
|
|
3, 6
|
Mechanical resistance, Rms
|
0.39
|
|
0.39
|
|
[Ns/m]
|
|
3, 6
|
Mechanical Q, Qms
|
7.5
|
|
7.4
|
|
[-]
|
|
3, 6
|
Electrical Q, Qes
|
0.49
|
|
0.59
|
|
[-]
|
|
3, 6
|
Total Q, Qts
|
0.46
|
|
0.55
|
|
[-]
|
|
4
|
Voice coil resistance, RDC
|
3.2
|
6.5
|
[ohm]
|
|
5
|
Voice coil inductance, Le (measured at 10 kHz)
|
0.16
|
0.28
|
[mH]
|
|
|
Voice coil inside diameter
|
32
|
32
|
[mm]
|
|
|
Voice coil winding height
|
11
|
11
|
[mm]
|
|
|
Air gap height
|
5
|
5
|
[mm]
|
|
|
Theoretical linear motor stroke, Xmax
|
+/-3
|
+/-3
|
[mm]
|
|
|
Magnet weight
|
325
|
325
|
[g]
|
|
|
Total unit net weight excl. packaging
|
0.95
|
0.95
|
[kg]
|
|
3, 5
|
Krm
|
1.13
|
2.06
|
[mohm]
|
|
3, 5
|
Erm
|
0.73
|
0.72
|
[-]
|
|
3, 5
|
Kxm
|
2.2
|
3.5
|
[mH]
|
|
3, 5
|
Exm
|
0.74
|
0.75
|
[-]
|
|
|
|
|
|
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
|
|
|
|
|
|
TERMINAL NOMINAL DIMENSIONS (mm)
|
|
|
|
PACKAGING AND ORDERING INFORMATION
|
|
|
|
|
Part no. WF118WA05-01
|
4 ohm version, individual packaging (one piece per box)
|
|
Part no. WF118WA05-02
|
4 ohm version, bulk packaging
|
|
Part no. WF118WA06-01
|
8 ohm version, individual packaging (one piece per box)
|
|
Part no. WF118WA06-02
|
8 ohm version, bulk packaging
|
|
|
|
|
Latest update: March 26 2024
|
|
|
|
|
|
|
|
Specifications are subject to change without any further notice.
Copyright © by Wavecor Ltd., China. All rights reserved.
|
|
|
