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Product 270944

Shure MC51B Microflex Lavalier Microphone

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The Shure MC51B is a unidirectional subminiature, electret condenser Lavalier microphone. It provides uncompromised sound quality and high reliabilit...Click To Read More About This Product

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The Shure MC51B is a unidirectional subminiature, electret condenser Lavalier microphone. It provides uncompromised sound quality and high reliability with minimal visibility in sound reinforcement applications such as television broadcasting and stage performances. Despite its small size, the microphone's condenser element provides full, clear and natural reproduction of speech.

The MC51B Unidirectional model is supplied with two types of equalization caps for high frequency response shaping. The mild boost equalization cap attenuates the natural high frequency peak of the microphone. The high boost cap does not attenuate the high frequency peak. The MC51B mic is also supplied with two foam windscreens to minimize wind noise. Included mounting accessories consist of a lapel clip, a tie clip, a pin mount, and a magnet mount, giving the user a wide variety of options for placement.

Consumer Alert:

Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For more information, call the FCC at 1-888-CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCCs wireless microphone website at:

Extended frequency response with user changeable equalization caps for response shaping (omni only)
Low visibility with a variety of options for mounting
Low handling noise
Legendary Shure quality, ruggedness, and reliability
Includes In-line preamplifier and 5-foot (1.5m) cable with TA4F connector
All foam windscreens
Type: Condenser (electret bias)
Polar Pattern: Cardioid
Output Impedance (at 1,000 Hz): 136 ohms actual (rated at 150 Ohms)
Output Level (at 1,000 Hz): -46 dBV/Pa (1 Pa = 94 dB SPL)
Maximum SPL: 143 dB at 1% THD/ 1 kilohm load
Frequency Response: 20 to 20,000 Hz
Output noise (equivalent SPL, A-weighted): 35 dB typical; 38 dB maximum
Dynamic Range: 108.0 dB
Signal-to-Noise Ratio: 59 dB at 94 dB SPL
Power Requirements: 11 to 52 Vdc (positive on pins 2 and 3, return on pin 1)
Current Drain: 4.6 mA
Polarity”Positive pressure on the diaphragm produces a positive voltage at:
pin 2 relative to pin 3 of the output connector of preamplifier
Overvoltage Protection: ±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%
Cable and connector: 1.5 m (5 ft) extended length small-diameter, shielded, with miniature female 4-pin connector (TA4F type)
Dimensions (Length x diameter): 5' (including cable) x 3 .23" (1.52 x 5.8 mm)
Net Weight: 4.3 oz. (121 g) with cable, connector, and preamplifier
See All Shure Lavalier Microphone Wireless Systems
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