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Shure MX391 Microflex Boundary Microphone
Part # MX391
Model # MX391

The Shure Microflex Boundary Microphones are equipped with features like programmable, silent membrane switches, logic inputs and outputs, and LED indicators, making them the high-quality solution for a range of applications such as altars, boardrooms and distance learning centers. Every Microflex Boundary microphone features a choice of interchangeable condenser cartridges.

Availability: Usually arrives in 5-9 business days.

Please be aware that global supply shortages outside our control may interfere with our normal delivery times and product availability. For more information, email [email protected] or call us at 888-256-4112.

List Price $264.00
Pro Acoustics Price $203.00
Your Savings $61.00 (23%)

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Pro Acoustics Price $203.00

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Description

Details

Shure Microflex MX391 Series microphones are small, surface-mounted electret condenser microphones designed for mounting on conference tables, stage floors, and lecterns. Their high sensitivity and wide frequency range make them especially suitable for picking up speech and vocals in sound reinforcement and recording applications.

Equipped with features like programmable, silent membrane switches, logic inputs and outputs, and LED indicators, Microflex Boundary Microphones are the high-quality solution for a range of applications such as altars, boardrooms and distance learning centers. Every Microflex Boundary microphone features a choice of interchangeable condenser cartridges.

MX391: Includes attached 12 ft (4 m) cable terminated with a 4-pin mini connector and separate preamplifier. A rubber strain relief is provided for applications that require removing the 4-pin mini connector and connecting the mic cable directly to screw terminals in the preamplifier.

Features

Features

  • Flat frequency response across the vocal range for uncolored sound
  • Interchangeable cardioid, supercardioid and omnidirectional cartridges
  • Your choice of black or off-white
  • Sleek, low-profile design for unobtrusive appearance
  • Balanced, transformerless output for increased immunity to noise over long cable runs
Specification
Polar PatternCardioid, Supercardioid, Omnidirectional
Environmental RequirementsOperating Temperature Range: -18 to 57 degrees C; Relative Humidity: 0 to 95%
Frequency Response50 to 17,000 Hz
Output Impedance (at 1000 Hz)180 ohms actual (rated at 150 ohms)
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)
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
Pickup Angle
Cardioid(–3 dB) = 130 °
Supercardioid(–3 dB) = 115 °
Omnidirectional = 360 °
Maximum Sound Pressure Level (1 kHz at 1% Total Harmonic Distortion, 1 k ohm load)
Cardioid118.8 dB
Supercardioid117.5 dB
Omnidirectional110.7 dB
Signal to Noise Ratio (referenced at 94 dB SPL)
Cardioid71.4 dB
Supercardioid72.7 dB
Omnidirectional79.5 dB
Equivalent Output Noise (A-weighted)
Cardioid22.6 dB SPL
Supercardioid21.3 dB SPL
Omnidirectional14.5 dB SPL
Open Circuit Sensitivity 1 kHz ref. 1 V per Pascal
Cardioid–29.6 dB (33.5 mV)
Supercardioid–28.3 dB (38.5 mV)
Omnidirectional–21.5 dB (81.4 mV)
Dimensions (H x W x D)2.09" (5.3 cm) x 3.13" (7.9 cm) x 0.75" (1.9 cm)
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