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.

Shure MC51B Microflex Lavalier Microphone Features:

• 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

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Shure MC51B Microflex Lavalier Microphone Specifications:

• 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