SPECIFICATIONS | WL50 Measured with test circuit (see User Guide) | WL50LO Measured with test circuit (see User Guide) | MC50 Measured with RPM626 Preamplifier | WL51 Measured with test circuit (see User Guide) | MC51 Measured with RPM626 Preamplifier |
Condenser (electret bias) | Condenser (electret bias) | Condenser (electret bias) | Condenser (electret bias) | Condenser (electret bias) | Condenser (electret bias) |
Polar Pattern | Omnidirectional | Omnidirectional | Omnidirectional | Cardioid | Cardioid |
Output Impedance | N/A | N/A | 136 ohms actual (rated at 150 ohms) | N/A | 136 ohms actual (rated at 150 ohms) |
Recommended Min. Input Impedance | 20 kilohms | 20 kilohms | N/A | 20 kilohms | N/A |
Output Level | 45.0 dBV/Pa (1 Pa=94 dB SPL) | 54.0 dBV/Pa (1 Pa=94 dB SPL) | 41.0 dBV/Pa (1 Pa=94 dB SPL) | 50.0 dBV/Pa (1 Pa=94 dB SPL) | 46.0 dBV/Pa (1 Pa=94 dB SPL) |
Maximum SPL | 133 dB at 1% THD/ 20 kilohm load | 142 dB at 1% THD/ 20 kilohm load | 138 dB at 1% THD/ 1 kilohm load | 138 dB at 1% THD/ 20 kilohm load | 143 dB at 1% THD/1 kilohm load |
Frequency Response | 20 to 20,000 Hz | 20 to 20,000 Hz | 20 to 20,000 Hz | 20 to 20,000 Hz | 20 to 20,000 Hz |
Dynamic Range | 103.0 dB | 103.0 dB | 108.0 dB | 103.0 dB | 108.0 dB |
Output Noise (equivalent SPL, A-weighted) | 30 dB typical; 33 dB maximum | 39 dB typical; 42 dB maximum | 30 dB typical; 33 dB maximum | 35 dB typical; 38 dB maximum | 35 dB typical; 38 dB maximum |
Signal-to-Noise Ratio | 64 dB at 94 dB SPL | 55 dB at 94 dB SPL | 64 dB at 94 dB SPL | 59 dB at 94 dB SPL | 59 dB at 94 dB SPL |
Power Requirements | +5 Vdc on pin 2, return on pin 1 (ground). | +5 Vdc on pin 2, return on pin 1 (ground). | 11 to 52 Vdc (positive on pins 2 and 3, return on pin 1). | +5 Vdc on pin 2, return on pin 1 (ground). | 11 to 52 Vdc (positive on pins 2 and 3, return on pin 1). |
Current Drain | 60130 µA | 60130 µA | 4.6 mA | 60130 µA | 4.6 mA |
PolarityPositive pressure on the diaphragm produces a positive voltage at: | Pin 3 relative to pin 1 at the output connector of the microphone. | pin 2 relative to pin 3 of the output connector of preamplifier. | pin 3 relative to pin 1 at the output connector of the microphone. | pin 2 relative to pin 3 of the output connector of preamplifier. |
Overvoltage Protection | N/A | N/A | +/- 75.0 Vdc maximum from pins 2 and 3 to pin 1. | N/A | +/- 75.0 Vdc maximum from pins 2 and 3 to pin 1. |
Cap and Overmold Material | Polypropylene |
Environmental Conditions | Operating Temperatures: 18 to 57 degrees C (0 to 135 degrees F) Storage Temperatures: 29 to 74 degrees C (20 to 165 degrees F) Humidity: 0 to 95% |
Packaged Weight | 188 g (6.63 oz.) | 188 g (6.63 oz.) | 305 g (10.76 oz.) | 188 g (6.63 oz.) | 305 g (10.76 oz.) |
Cable and Connector | 1.5 m (5 ft.), small-diameter, shielded, with miniature female 4-pin connector (TA4F type). WL50X: 3 m (10 ft.) small-diameter, shielded, with stripped and tinned leads. | 1.5 m (5 ft.), small-diameter, shielded, with miniature female 4-pin connector (TA4F type). WL50XLO: 3 m (10 ft.) small-diameter, shielded, with stripped and tinned leads. | 1.5 m (5 ft.), small-diameter, shielded, with miniature female 4-pin connector (TA4F type). | 1.5 m (5 ft.), small-diameter, shielded, with miniature female 4-pin connector (TA4F type). | 1.5 m (5 ft.), small-diameter, shielded, with miniature female 4-pin connector (TA4F type). |
Microphone and Preamp Dimensions | See User Guide |
Net Weight | WL50: 21 g (0.7 oz.) with cable and connector. WL50X: 28 g (1.0 oz.) with 3 m (10 ft.) stripped and tinned cable. | WL50LO: 21 g (0.7 oz.) with cable and connector. WL50XLO: 28 g (1.0 oz.) with 3 m (10 ft.) stripped and tinned cable. | 121 g (4.3 oz.) with cable, connector, and preamplifier. | WL51 21 g (0.7 oz.) with cable and connector. | 121 g (4.3 oz.) with cable, connector, and preamplifier. |
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