Shure MX391 Omni Directional Boundary Microphone



Featuring the low-profile design of the MX393 at half the size! The smooth, wide frequency response and high sensitivity are perfect for boardrooms, altars and courtrooms. Other features include interchangeable capsules, dent resistant steel grilles, mounting holes, bottom cable exit and attached 12′ cable and preamp. MX391 requires phantom power.


  • Flat frequency response across the vocal range foruncolored sound
  • Interchangeable cardioid, supercardioid, andomnidirectional cartridgesthat provide optimal choice for each application
  • Sleek, low-profile design for unobtrusive appearance
  • Balanced, transformerless output for increased immunity to noise overlongcable runs


  • Polar Pattern: Omnidirectional
  • Frequency Response: 50Hz to 17kHz
  • Output Impedance: 180 ohms actual (rated at 150 ohms)
  • Maximum SPL: 110.7 dB
  • Signal to Noise Ratio: 79.5 dB
  • Dynamic Range: 96.2 dB
  • Power Requirements: 11 to 52 Vdc phantom
  • Cable: 12 foot (4 meter) Attached Cable to 4-Pin Mini Connector (TA4F)
  • Accessories Included: Zipper bag, In-Line Preamp, Hex Wrench
UPC: 042406051514



SKU: SURMX391/O Category: Tags: ,
Analog Performance
Transducer Electret Condenser
Polar Pattern Omnidirectional
Frequency Range 50 Hz to 17 kHz
Signal to Noise Ratio 79.5 dB
Equivalent Noise Level 14.5 dB A-Weighted
Maximum SPL 110.7 dB SPL
THD 1%
Impedance 150 Ohms
Sensitivity 81.4 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 1.1 lb
Box Dimensions (LxWxH) 9.9 x 4.8 x 3.0″

Based on 0 reviews

0.0 overall

Be the first to review “Shure MX391 Omni Directional Boundary Microphone”

There are no reviews yet.

Leaving so soon?Register for our weekly product deals!

We send out weekly deals without you having to lift a finger. Simply subscribe to our email list to receive the best deals on our top products every week. We promise not to inundate you with emails, and should you lose interest you can unsubscribe at any time.