Shure MX391/S Supercardioid Boundary Microphone

Shure MX391/S Supercardioid Boundary Microphone


SKU SURMX391/S Category Tags ,



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: 042406051507


Analog Performance
Transducer Electret Condenser
Polar Pattern Supercardioid
Frequency Range 50 Hz to 17 kHz
Signal to Noise Ratio 72.7 dB
Equivalent Noise Level 21.3 dB A-Weighted
Maximum SPL 117.5 dB SPL
THD 1%
Impedance 150 Ohms
Sensitivity 38.5 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 1.06 lb
Box Dimensions (LxWxH) 9.75 x 4.7 x 3.25″


There are no reviews yet.

Be the first to review “Shure MX391/S Supercardioid Boundary Microphone”

Your email address will not be published. Required fields are marked *