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Thumbnail Filmstrip of Wavecor WF223BD03 - 8.75in. 4 Ohm Die Cast Paper Glass Fibre Cone Mid-Woofer Images
Wavecor Speaker Driver - WF223BD03 - 8 ¾" 4 Ohm Die Cast Paper/Glass Fibre Cone Mid-Woofer
Description
The Wavecor WF223BD03 is a 4 Ohm 8¾" paper cone mid-woofer engineered for
demanding bass and midrange performance in high-end hi-fi systems, home theatre installations, and high quality multimedia
setups. Designed for exceptional clarity and wide bandwidth, it features an optimised paper cone that ensures smooth frequency
response and low distortion across its operating range.
Powered by a robust motor structure and a large 39 mm voice coil, the WF223BD03 delivers outstanding thermal and mechanical power handling. Distortion is further minimised through effective chassis and voice coil venting, combined with an internal aluminium field-stabilising shorting ring that stabilises the magnetic field within the air gap. The WF223BD03 is an excellent driver choice for high-performance 2-way or 3-way speaker designs. Replacement for the WF223BD01.
Features:
- 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 minimise variations in voice coil inductance as a function of voice coil position
- Cone made of a new paper/glass fibre mix with improved consistency and stability
- 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 and compressions at large cone excursions
- Heavy-duty black fibreglass 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-stabilising 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
Technical Specifications
| Notes | Parameter | Before Burn-in | After Burn-in | Unit |
|---|---|---|---|---|
| - | Nominal size | 8¾ | inch | |
| - | Nominal impedance | 4 | Ohm | |
| - | Recommended max. upper frequency limit | 2 | kHz | |
| 1, 4 | Sensitivity, 2.83V/1m (average SPL in range 200 - 1000 Hz) | 90 | dB | |
| 2, 4 | Power handling, short term, IEC 268-5, 6 kHz, no additional filtering | 1200 | W | |
| 2, 4 | Power handling, long term, IEC 268-5, 6 kHz, no additional filtering | 300 | W | |
| 2 | Power handling, continuous, IEC 268-5, 6 kHz, no additional filtering | 150 | W | |
| - | Effective radiating area, Sd | 213 | cm² | |
| 3, 4, 6 | Resonance frequency (free air, no baffle), Fs | 32.6 | 31 | Hz |
| - | Moving mass, incl. air (free air, no baffle), Mms | 34 | g | |
| 3, 4 | Force factor, Bxl | 7.7 | - | |
| 3, 4, 6 | Suspension compliance, Cms | 0.70 | 0.77 | mm/N |
| 3, 4, 6 | Equivalent air volume, Vas | 45 | 49.5 | ml |
| 3, 4, 6 | Mechanical resistance, Rms | 0.48 | 0.48 | Ns/m |
| 3, 4, 6 | Mechanical Q, Qms | 14.5 | 13.8 | - |
| 3, 4, 6 | Electrical Q, Qes | 0.40 | 0.38 | - |
| 3, 4, 6 | Total Q, Qts | 0.39 | 0.37 | - |
| 4 | Voice coil resistance, Rdc | 3.4 | Ohm | |
| 5 | Voice coil inductance, Le (measured at 10 kHz) | 0.13 | mH | |
| - | Voice coil inside diameter | 39 | mm | |
| - | Voice coil winding height | 18 | mm | |
| - | Air gap height | 5 | mm | |
| - | Theoretical linear motor stroke, Xmax | ±6.5 | mm | |
| - | Magnet weight | 0.967 | g | |
| - | Total unit net weight (excl. packaging) | 2.5 | kg | |
Specification Notes:
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°C.
Note 5: Standard coil models simplify voice
coil inductance. Wavecor utilises the advanced Wright empirical model (TSL model in LEAP-4) using parameters Krm, Erm, Kxm,
and Exm for increased simulation accuracy.
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.