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 | Wavecor WF120BD03-01 (ea.) |  |
 | 4¾", Balanced Drive, die cast alu, paper cone, 90 mm ferrite, 1" VC, 4 ohm, individual packaging
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 | Wavecor WF120BD03-01 (ea.) midbass driver's product information |  |
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The 4¾” transducers WF120BD03 (4 ohm) and WF120BD04 (8 ohm) were designed as high performance bass and midrange units for very compact monitors and high-end hi-fi speakers.
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 minimize variations in voice coil inductance as a function of voice coil position
- Black coated semi-air-dried paper cone
- 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 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 1¼” 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 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
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 | Wavecor WF120BD03-01 (ea.) midbass driver's specifications |  |
| Nominal size | 4¾ [inch.] |
| Nominal impedance | 4 [ohm] |
| Recommended max. upper frequency limit | 4 [kHz] |
| Sensitivity, 2.83V/1m (average SPL in range 400 - 1,000 Hz) | 84.5 [dB] |
| Power handling, continuous, IEC 268-5, no additional filtering | 60 [W] |
| Effective radiating area, Sd | 52 [sq.cm] |
| Resonance frequency (free air, no baffle), Fs | 43 [Hz] |
| Moving mass, incl. air (free air, no baffle), Mms | 9.3 [g] |
| Force factor, Bxl | 4.9 |
| Suspension compliance, Cms | 1.47 [mm/N] |
| Equivalent air volume, Vas | 5.6 [lit.] |
| Mechanical Q, Qms | 7 |
| Electrical Q, Qes | 0.33 |
| Total Q, Qts | 0.32 |
| Voice coil resistance, RDC | 3.2 [ohm] |
| Voice coil inductance, Le (measured at 10 kHz) | 0.12 [mH] |
| Voice coil inside diameter | 32 [mm] |
| Voice coil winding height | 12 [mm] |
| Air gap height | 4 [mm] |
| Magnet weight | 370 [g] |
| Total unit net weight excl. packaging | 1.0 [kg] |
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 | Wavecor WF120BD03-01 (ea.) Midbass Driver additional photos |  |
 | More information about Wavecor WF120BD03-01 (ea.) Midbass |  |
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