Shure MX393/S Microflex Condenser Boundary Microphone (Supercardioid)


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Dale #:SHUR-MX393S

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  • MX392 and MX393 Microflex® Wired Boundary Microphones from Shure are equipped with features like programmable, silent membrane switches, logic inputs and outputs, and green LED indicators. The high-quality solution for a range of applications such as altars, boardrooms and distance learning centers, Microflex Boundary microphones feature interchangeable condenser cartridges.

    The MX393 is a surface-mount mic with miniature three pin connector and12' XLR cable.


    • Flat frequency response across the vocal range for uncolored sound
    • Interchangeable cardioid, supercardioid, and omnidirectional cartridges that provide optimal choice for each application
    • Sleek, low-profile design for unobtrusive appearance
    • Balanced, transformerless output for increased immunity to noise over long cable runs
    • Programmable membrane on/off switch plus LED on/off indicator
    • LED logic input and switch logic output terminals for remote control or use with automatic mixers (MX392 models only)
  • Frequency Response50 to 17,000 Hz
    Output Impedance (at 1000 Hz)180 ohms actual (rated at 150 ohms)
    Open Circuit Sensitivity 1 kHz ref. 1 V per PascalCardioid: -29.6 dB (33.5 mV)
    Supercardioid: -28.3 dB (38.5 mV)
    Omnidirectional: -21.5 dB (81.4 mV)
    All settings -12 dB at 0 gain; 1 Pascal = 94 dB SPL
    Maximum Sound Pressure Level (1 kHz at 1% Total Harmonic Distortion, 1 k ohm load)Cardioid: 118.8 dB
    Supercardioid: 117.5 dB
    Omnidirectional: 110.7 dB
    All settings +6 dB at 0 gain
    Signal to Noise Ratio (referenced at 94 dB SPL)Cardioid: 71.4 dB
    Supercardioid: 72.7 dB
    Omnidirectional: 79.5 dB
    Equivalent Output Noise (A-weighted)Cardioid: 22.6 dB SPL
    Supercardioid: 21.3 dB SPL
    Omnidirectional: 14.5 dB SPL
    Dynamic Range at 1 k ohm Load96.2 dB
    100 dB at 0 gain
    Common Mode Rejection45 dB minimum, 10 Hz to 100 kHz
    Preamplifier Output Clipping Level-6 dBV (0.5 V)
    12 dB at 0 gain
    PolarityPositive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of the preamplifier XLR output connector.
    Power Requirements11 to 52 Vdc phantom
    2.0 mA current consumption
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