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Thumbnail Filmstrip of Wavecor Speaker Driver WF118WA01- 4 Ohm Paper Cone Mid-Woofer Images
Wavecor Speaker Driver - WF118WA01- 4 Ohm 4½" Paper Cone Mid-Woofer
Description
Nominal impedance is 4 ohm for WF118WA01 and 8 ohm for WF118WA02. Otherwise the two models are identical.
WF118WA01/02 are mid/woofers designed for demanding bass and midrange applications. It works equally well for high-end hi-fi, high quality home theater systems, and top multimedia setups.
Powered by a large 85mm magnet structure that ensures good efficiency and optimal T/S parameters. The large 32mm voice coil ensures high power handling - thermally and mechanically
The optimized paper cone ensures large bandwidth and low distortion. Distortion is further reduced by efficient venting and an alu shorting ring stabilizing the magnetic field in the air gap. WF118WA01/02 are excellent choices for very compact 2-way speaker systems or even as midrange in multi-way systems
Features
- Alu field-stabilizing ring inside magnet assembly for reduced distortion at high levels
- Vented voice coil former for reduced distortion and compression
- New vented chassis for lower air flow speed reducing audible distortion
- Voice coil wound with Copper Clad Aluminium Wire for higher efficiency and better dynamics
- Heavy-duty black fiber glass voice coil bobbin to increase power handling and reduce mechanical losses resulting in better dynamic performance and low-level details
- Large motor system with 1¼” voice coil diameter and 85mm magnet for better control and efficiency
- Black magnet parts for better heat transfer to increase power handling
- Long linear stroke motor for reduced distortion at high levels
- New progressive suspension with specially designed CONEX damper (spider) for long durability under extreme operating conditions
- Gold plated terminals to prevent oxidation for long-term reliable connection
Frequency SPL and Impedance Response Graphs
Loudspeaker Frequency Response Graph
Measuring conditions, SPL
Driver mounting: Flush in infinite baffle
Microphone distance: 1.0 m
Input level: 2.83 VRMS
Smoothing: 1/6 oct.
Loudspeaker Impedance Response Graph
Measuring conditions, impedance
Driver mounting: Free air, no baffle
Input signal: Stepped sine wave, semi-current-drive, nominal current 2 mA
Smoothing: None
Technical Specifications
| Parameter | Value | Unit |
| Nominal size | 4½ | inch |
| Nominal impedance | 4 | Ohm |
| Recommended upper frequency limit |
4 | kHz |
| Sensitivity, 2.83V/1m (average SPL in range 500 - 4000 Hz) | 89 | dB |
| Recommended cabinet volume | 2-4 | lit. |
| Voice coil diameter | 32.5 | mm |
| Voice height | 11 | mm |
| Air gap height | 5 | mm |
| Voice coil resistance, RDC | 3.2 | Ohm |
| Magnet Weight | 325 | g |
| Effective radiating area, Sd | 55 | sq.cm |
| Power handling, continuous, IEC 268-5 Resonance freq., Fs | 50 | W |
| Mechanical Q, Qm | 64 | Hz |
| Electrical Q, Qe | 0.38 | - |
| Total Q, Qt | 0.36 | - |
| Moving Mass including air | 6.2 | g |
| Suspension compliance, Cms | 1.0 | mm/N |
| Equiv. air volume, Vas | 4.3 | lit. |
| Total unit net weight | 0.95 | kg. |
| Voice coil inductance @ 10 kHz | 0.16 | mH |
Driver Nominal Dimensions
Loudspeaker Driver Dimensions and Measurements - all dimensions in mm (approx.)
Terminal Nominal Dimensions
Loudspeaker Driver Terminal Dimensions and Measurements - all dimensions in mm (approx.)
Thickness, both terminals: 0.5 mm
Terminal plating: Gold