| SPECIFICATIONS |
WL50
Measured with test circuit (see User Guide) |
WL50–LO
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 |
60–130 µA |
60–130 µA |
4.6 mA |
60–130 µA |
4.6 mA |
Polarity—Positive 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).
WL50X–LO: 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).
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). |
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. |
WL50–LO: 21 g (0.7 oz.) with
cable and connector.
WL50X–LO: 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. WL51X: 28 g
(1.0 oz.) with 3 m (10 ft.)
stripped and tinned cable. |
121 g (4.3 oz.) with cable,
connector, and preamplifier. |
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