![](../assets/images/autogen/clearpixel.gif) |
![Navigate Navigate](../assets/images/autogen/White100x100.gif) |
![](../assets/images/autogen/clearpixel.gif) |
|
![](../assets/images/autogen/clearpixel.gif) |
|
|
![Wavecor Wavecor](../assets/images/Wavecor_logo_250px1.jpg) |
|
|
|
|
|
![](../assets/images/autogen/clearpixel.gif) |
![](../assets/images/autogen/clearpixel.gif) |
|
The 8.75” transducers WF223BD01 (4 ohm) and WF223BD02 (8 ohm) were designed as high performance bass/midrange units for monitors and high-end hi-fi speakers. They offer outstanding deep bass performance and dynamic and detailed midrange. Ideal for 3-way constructions they additionally offer designers the rare opportunity of working with 8” 2-way solutions if paired with a suitable tweeter like for instance some of the Wavecor 30 mm units.
|
|
|
![](../assets/images/autogen/clearpixel.gif) |
|
|
![](../assets/images/autogen/clearpixel.gif) |
![](../assets/images/autogen/clearpixel.gif) |
|
Download SPL and impedance response curves as text files
|
|
![WF223BD01 SPL response WF223BD01 SPL response](../assets/images/Notepad-logo.gif)
|
WF223BD01 SPL response
|
![WF223BD01 impedance response WF223BD01 impedance response](../assets/images/Notepad-logo.gif)
|
WF223BD01 impedance response
|
![WF223BD02 SPL response WF223BD02 SPL response](../assets/images/Notepad-logo.gif)
|
WF223BD02 SPL response
|
![WF223BD02 impedance response WF223BD02 impedance response](../assets/images/Notepad-logo.gif)
|
WF223BD02 impedance response
|
|
![](../assets/images/autogen/clearpixel.gif) |
![](../assets/images/autogen/clearpixel.gif) |
|
Important! Please observe that these text files for download are actual measurements of the drivers measured in infinite baffle and without any enclosure. Measuring the drivers in a finite baffle (like the baffle of most speaker cabinets) and in any size of enclosure will lead to different response curves.
|
|
|
![](../assets/images/autogen/clearpixel.gif) |
![](../assets/images/autogen/clearpixel.gif) |
|
FEATURES
|
![](../assets/images/autogen/clearpixel.gif) |
![](../assets/images/autogen/clearpixel.gif) |
|
- 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 center pole with dual flares for reduced noise level and compressions 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 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
|
![](../assets/images/autogen/clearpixel.gif) |
![](../assets/images/autogen/clearpixel.gif) |
|
FREQUENCY RESPONSE
|
![](../assets/images/autogen/clearpixel.gif) |
![](../assets/images/autogen/clearpixel.gif) |
|
NOMINAL SPECIFICATIONS
|
![](../assets/images/autogen/clearpixel.gif) |
|
|
Notes
|
Parameter
|
WF223BD01
|
WF223BD02
|
Unit
|
Before burn-in
|
After burn-in
|
Before burn-in
|
After burn-in
|
|
Nominal size
|
8.75
|
8.75
|
[inch.]
|
|
Nominal impedance
|
4
|
8
|
[ohm]
|
|
Recommended max. upper frequency limit
|
2
|
2
|
[kHz]
|
1, 4
|
Sensitivity, 2.83V/1m (average SPL in range 200 - 1,000 Hz)
|
90
|
87
|
[dB]
|
2, 4
|
Power handling, short term, IEC 268-5, no additional filtering
|
1,200
|
1,200
|
[W]
|
2, 4
|
Power handling, long term, IEC 268-5, no additional filtering
|
300
|
300
|
[W]
|
2
|
Power handling, continuous, IEC 268-5, no additional filtering
|
150
|
150
|
[W]
|
|
Effective radiating area, Sd
|
213
|
213
|
[sq.cm]
|
3, 4, 6
|
Resonance frequency (free air, no baffle), Fs
|
32.6
|
31
|
33.1
|
31.6
|
[Hz]
|
|
Moving mass, incl. air (free air, no baffle), Mms
|
34
|
33
|
[g]
|
3, 4
|
Force factor, Bxl
|
7.7
|
9.5
|
[N/A]
|
3, 4, 6
|
Suspension compliance, Cms
|
0.70
|
0.77
|
0.70
|
0.77
|
[mm/N]
|
3, 4, 6
|
Equivalent air volume, Vas
|
45
|
49.5
|
45
|
49.5
|
[lit.]
|
3, 4, 6
|
Mechanical resistance, Rms
|
0.48
|
0.48
|
0.48
|
0.48
|
[Ns/m]
|
3, 4, 6
|
Mechanical Q, Qms
|
14.5
|
13.8
|
14.3
|
13.6
|
[-]
|
3, 4, 6
|
Electrical Q, Qes
|
0.40
|
038
|
0.47
|
0.45
|
[-]
|
3, 4, 6
|
Total Q, Qts
|
0.39
|
0.37
|
0.46
|
0.435
|
[-]
|
4
|
Voice coil resistance, RDC
|
3.4
|
6.2
|
[ohm]
|
5
|
Voice coil inductance, Le (measured at 10 kHz)
|
0.13
|
0.20
|
[mH]
|
|
Voice coil inside diameter
|
39
|
39
|
[mm]
|
|
Voice coil winding height
|
18
|
18
|
[mm]
|
|
Air gap height
|
5
|
5
|
[mm]
|
|
Theoretical linear motor stroke, Xmax
|
+/-6.5
|
+/-6.5
|
[mm]
|
|
Magnet weight
|
0.97
|
0.97
|
[kg]
|
|
Total unit net weight excl. packaging
|
2.5
|
2.5
|
[kg]
|
3, 4, 5
|
Krm
|
|
|
[mohm]
|
3, 4, 5
|
Erm
|
|
|
[-]
|
3, 4, 5
|
Kxm
|
|
|
[mH]
|
3, 4, 5
|
Exm
|
|
|
[-]
|
|
![](../assets/images/autogen/clearpixel.gif) |
|
|
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 10/14.1 VRMS (4/8 ohm version). The unit is not burned in before shipping.
|
|
![](../assets/images/autogen/clearpixel.gif) |
![](../assets/images/autogen/clearpixel.gif) |
|
OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)
|
|
|
![](../assets/images/autogen/clearpixel.gif) |
![](../assets/images/autogen/clearpixel.gif) |
|
PACKAGING AND ORDERING INFORMATION
|
![](../assets/images/autogen/clearpixel.gif) |
|
|
Part no. WF223BD01-01
|
4 ohm version, individual packaging (one piece per box)
|
Part no. WF223BD02-01
|
8 ohm version, individual packaging (one piece per box)
|
|
![](../assets/images/autogen/clearpixel.gif) |
![](../assets/images/autogen/clearpixel.gif) |
|
Latest update: February 29, 2024
|
|
|
|
|
|
Specifications are subject to change without any further notice. Copyright © 2006-2023 by Wavecor Ltd., China. All rights reserved.
|
|
![](../assets/images/autogen/clearpixel.gif) |
|
|
![](../assets/images/autogen/clearpixel.gif) |
MORE INFO
|
|
|
|
|
|