Shure MX393C Condenser Boundary Microphone

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    Product Description

    The Shure Microflex MX393C Cardioid Condenser Boundary Microphone is a surface-mounted electret condenser microphone designed primarily for mounting on conference tables, stage floors, and lecterns. The MX393C has high sensitivity and wide frequency range making it especially suitable for picking up speech and vocals in sound reinforcement and recording applications. Interchangeable cartridges provide the installer with greater flexibility and make it possible to easily reconfigure microphone coverage as the need arises. The Shure MX393C includes an internal pre amplifier, a programmable membrane on/off switch, an on/off indicator LED, and a miniature, four pin connector.

    Shure's MX300 Series microphones take advantage of the principle that, at a barrier or boundary, the sound pressure level doubles. When placed near a sufficiently large boundary surface, the microphone has 6 dB higher sensitivity and approximately 3 dB greater direct-to-reverberant sound ratio.


    • Flat frequency response across the vocal range for uncolored sound
    • Interchangeable cardioid, supercardioid, and omnidirectional cartridges that provide choices for applications
    • Sleek, low-profile design for unobtrusive appearance
    • Balanced transformerless output for increased immunity to noise over long cable runs
    • Low susceptibility to electromagnetic hum and RFI
    • Programmable on/off switch and LED on/off indicator
    • On/Off switch

    Product Specifications
    Shure MX393C Cardioid Condenser Boundary Microphone Specifications
    • Frequency Response: 50 to 17,000 Hz
    • Polar Pattern: Cardioid
    • Output Impedance: EIA Rated at 150 O (180 O actual)
    • Sensitivity (at 1 kHz, open circuit voltage): –27.5 dBV/Pa (42.2 mV) 1 Pascal=94 dB SPL
    • Maximum Sound Pressure Level: 117.0 dB (1 kHz at 1% Total Harmonic Distortion,1 kO load)
    • Signal to Noise Ratio: 71 dB (referenced at 94 dB SPL)
    • Equivalent Output Noise: 23 dB (A-weighted)
    • Dynamic Range: 94.0 dB
    • Common Mode Rejection: 45 dB minimum (10 Hz to 100 kHz)
    • Switch Attenuation: 50 dB minimum
    • Preamplifier Output Clipping Level: –6 dBV (0.5 V)
    • Polarity: Positive sound pressure on diaphragm (Pin 2: positive voltage)
    • Power Requirements:
      • 11 to 52 Vdc phantom
      • 2.0 mA current consumption
    • Environmental Requirements:
      • Operating Temperature Range: –18° C to 57° C (0° F to 135° F)
      • Relative Humidity: 0 to 95%
    • Dimensions (L x W x H): 4.263 x 3 x .833 inches (108.3 x 76.2 x 21.16 mm)

    Helpful Info about the Manufacturer
    Phone:  800-257-4873 Warranty:  2 Years
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