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WF223BD03/04 8¾” die cast, black paper/glass fibre cone mid/woofers

39 mm voice coil ensuring high power handling and improved mechanical stability.

Field-stabilizing alu ring reducing magnetic field variations at high power levels.

Copper cap on center pole to reduce voice coil inductance and to minimize impedance variations.

Vented center pole with dual flares for reduced noise level and compressions.

Low-loss suspension (high Qm) for improved details and dynamics.

Rigid die cast alu chassis.

Mid/woofers WF223BD03/04 are black coated versions of models WF223BD01/02..
No other differences.
Specifications are identical coated/non-coated.
Wavecor Balanced Drive Technology
WF223BD03_04-SPL

 

WF223BD03

WF223BD04

 

Nominal size

223

223

mm

Nominal impedance

4

8

ohm

Recommended max. upper frequency limit

2

2

kHz

Sensitivity, 2.83V/1m (average SPL in range 100 - 3,000Hz)

90

87

dB

Power handling, long term, IEC 268-5, without enclosure

300

300

W

Voice coil resistance, RDC

3.4

6.2

ohm

Effective radiating area, Sd

213

213

sq.cm

Resonance frequency (free air, no baffle), Fs

32.6

33.1

Hz

Moving mass, incl. air (free air, no baffle), Mms

34

33

g

Force factor, Bxl

7.7

9.5

N/A

Equivalent air volume, Vas

45

45

lit.

Mechanical Q, Qms

14.5

14.3

-

Electrical Q, Qes

0.40

0.47

-

Total Q, Qts

0.39

0.46

-

Theoretical linear motor stroke, Xmax

+/-6.5

+/-6.5

mm

Specifications are before burn-in

Downloads
SPL and impedance response curves as text files

WF223BD03 SPL response

WF223BD03 SPL response

WF223BD03 impedance response

WF223BD03 impedance response

WF223BD04 SPL response

WF223BD04 SPL response

WF223BD04 impedance response

WF223BD04 impedance response

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.

PACKAGING AND ORDERING INFORMATION

Part no. WF223BD03-01

4 ohm version, individual packaging (one piece per box)

Part no. WF223BD03-02

4 ohm version, bulk/industrial packaging

Part no. WF223BD04-01

8 ohm version, individual packaging (one piece per box)

Part no. WF223BD04-02

8 ohm version, bulk/industrial packaging

Latest update: Oct. 28, 2026
 

Specifications are subject to change without any further notice.
Copyright © by Wavecor Ltd., China. All rights reserved.
 
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MORE INFO

WF223BD03/04 specificationsPDF data sheet

 

Balanced Drive technical paperBalanced Drive technical paper (2.34 MB)

 

 

 

 

 

 
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