Shure MX391/C Microflex Cardioid Surface Mount Microphone (Black)

Shure MX391/C Microflex Cardioid Surface Mount Microphone (Black)

Shure MX391/C Microflex Cardioid Surface Mount Microphone (Black)

B&H # SHMX391C MFR # MX391/C
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Color: Black

Shure MX391/C Microflex Cardioid Surface Mount Microphone (Black) Shure MX391W/C Microflex Cardioid Surface Mount Microphone (White)

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Polar Pattern: Cardioid

Cardioid Omnidirectional

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Shure MX391 overview

  • 1Description

The black MX391 from Shure is a small, surface-mounted electret condenser microphone. It is designed to be mounted on conference tables, stage floors, and lecterns. Its high sensitivity and wide frequency range make it especially suitable for picking up speech and vocals in sound reinforcement and recording applications.

Flat frequency response across the vocal range for uncolored sound
Interchangeable cartridges provide a choice of polar pattern for each application
Sleek, low-profile design for unobtrusive appearance
Balanced, transformerless output for increased immunity to noise over long cable runs
RF filtering
UPC: 042406051521
In the Box
Shure MX391/C Microflex Cardioid Surface Mount Microphone (Black)
  • Zipper Bag
  • 12' In-Line Preamplifier
  • Hex Wrench
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description

    Shure MX391 specs

    Analog Performance
    Transducer Electret Condenser
    Polar Pattern Cardioid
    Frequency Range 50 Hz to 17 kHz
    Signal to Noise Ratio 71.4 dB 
    Equivalent Noise Level 22.6 dB A-Weighted
    Maximum SPL 118.8 dB SPL
    THD 1%
    Impedance 150 Ohms
    Sensitivity 33.5 mV/Pa
    Dynamic Range 96.2 dB
    Output Connectors 1 x 3-Pin XLR
    Cable Length 12'; / 3.7 m
    Operating Current Consumption 2 mA
    Operating Voltage 11 to 52 V
    Operating Temperature 0 to 135°F / -17.78 to 57.22°C
    Operating Humidity 0 to 95%
    Storage Temperature -20 to 165°F / -28 to 73.89°C
    Length 3.126" / 7.94 cm
    Packaging Info
    Package Weight 1.05 lb
    Box Dimensions (LxWxH) 10.2 x 5.0 x 3.3"

    Shure MX391 reviews

    MX391/C Microflex Cardioid Surface Mount Microphone (Black) is rated 5.0 out of 5 by 2.
    Rated 5 out of 5 by from Shure MX391W/C I vertically mounted this mic on a wall in a medical treatment classroom. It was to be used to hear conversation and responses by an observer in an adjoining area. I needed something unobtrusive and with enough sensitivity to provide clear audio, but without too much ambient noise. The MX391 is small, and the white color helps it to become almost invisible on the wall. Being mounted above the heads of the students and staff, the cardioid pickup pattern works great and helps to reject sound reflection from the ceiling. I had to build a TA4M extension cable in order to reach a wall mounted I/O plate, and another TA4F cable to reach the preamp, which I mounted beneath a countertop at the audio mixer in the adjoining room, but everything worked well. I've been using Shure products for many years, and they have never let me down.
    Date published: 2014-02-19
    Rated 5 out of 5 by from Excellent boundary mic This is astoundingly good boundary mic for $. Much more solid, heavy, and elegant (both the mic and the inline preamp unit) than I expected. Pattern and noise are just as advertised. For most conference room applications, the room noise (computers, AC, etc.) is going to be much louder than the self-noise of these mics. I will probably pick up more. This version does NOT have a mute button, BTW. B&H delivery and pricing were top notch, per usual!
    Date published: 2012-08-30
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