The Shure Model WCM16 head-worn electret condenser microphone is intended for wireless use by performers, lecturers, and others who require the highest quality voice pickup with maximum mobility. Its wide frequency response, low RF susceptibility and reliable operation at temperature and humidity extremes make the WCM16 suitable for virtually any vocal application. When used with the Shure Body-Pack Transmitters, the performance of the WCM16 closely resembles the finest conventional vocal microphones.
Miniaturized active circuitry included in the cartridge assembly provides equalization that tailors the low-frequency response to resemble the warm proximity effect of larger vocal microphones. Because of this low-end response, it is not necessary to position the microphone directly in front of the mouth, thus avoiding much popping and breath noise, even without the supplied foam pop screen.
The microphone's hypercardioid unidirectional pickup pattern provides maximum isolation from ambient noise and from adjacent sound sources such as musical instruments, loudspeakers and other performers. This permits higher gain-before-feedback without loss or masking of vocals.
Note: The headband tubing will not withstand repeated bending, so make this adjustment only once, if necessary.
Figure 1: PARTS OF THE WCM16 HEAD-WORN MICROPHONE
The hypercardioid unidirectional pickup pattern of the WCM16 has maximum rejection of unwanted sound sources at about a 110° angle each way from the front axis of the microphone (see Figure 1). Directly to the rear of the microphone (at 180°) there is as little as 6dB rejection-not much less pickup than at the front of the microphone (at 0°).
Sound sources that may cause feedback (such as monitor or P.A. speakers) or sound that you do not want to pick up with the WCM16 (such as percussion instruments or other performers) should NOT be placed directly to the rear of the microphone. It is better to adjust positioning so that unwanted sound sources are located at the 110° maximum rejection points. Note that when wearing the headset the rear of the microphone points out towards the wearer's left.
The WCM16 is configured for direct connection to a Shure Body-Pack Transmitter, such as models T1, T1G, T11, SC1, EC1, or LX1, using the attached cable.
The WCM16 is designed to be powered from the +5 Vdc source at microphone connector pin 2 of a Shure transmitter.
(Measured using test circuit in Figure 4)
Condenser (electret bias)
50 to 18,000 Hz
Hypercardioid, uniform with frequency
Open Circuit Voltage -55.0 dBV (1.8 mV at 0.6 m) 1 Pascal=94 dB SPL
150 dB at 1%THD
121 dB
29 dB equivalent SPL, A-weighted
65 dB at 94 dB SPL
| Microphone | Positive sound pressure on diaphragm produces positive voltage on pins 3 and 4 with respect to pin 1 (ground) of microphone output connector |
| Receiver--1/4 in. Output | Positive sound pressure on diaphragm produces positive voltage on tip of receiver 1/4" output connector |
| Receiver--XLR Output | Positive sound pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3 of the XLR output connector |
0.35 mA
+5 V DC (positive on pin 2, negative on pin 1)
| Operating Temperature | -18° to 60° C (0° to 140° F) |
| Storage Temperature | -29° to 66° C (-20° to 150° F) |
| Relative Humidity | 0 to 95% |
1.5m (5 ft), small-diameter, shielded, with 4-pin mini connector
Matte black enamel
36 g (1.27 oz.)
Figure 2: TYPICAL FREQUENCY RESPONSE
Figure 3: TYPICAL POLAR PATTERNS
Figure 4: TEST CIRCUIT AND WIRING
| 4-Pin Mini Connector (TA4F/TQG) | WA330 |
| Windscreen | 36A624 |
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