Shure MX391/O Microflex boundary microphone features programmable, silent membrane switches, logic inputs and outputs, LED indicators, and more. 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 4 meter (12 ft) 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.
Shure MX391/O Features
- 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
- MX391/O Microflex boundary microphone1
- 12 ft cable with 4-pin mini connector and in-line preamp1
- Rubber strain relief1
- Transducer TypeCondenser
- Polar PatternOmnidirectional
- Frequency Response50 Hz - 17 kHz
- Rated Output Impedance150 ohms (180 ohms actual)
- Sensitivity-21.8 dB (81.4 mV)
- Max. SPL (1 kHz at 1% THD, 1 kΩ load; All settings +6 dB at 0 gain (internal modification))117.5 dB
- Equivalent Output Noise (A-weighted)14.5 dB SPL
- Signal-to-Noise Ratio (referenced at 94 dB SPL at 1kHz)72.7 dB SPL
- Dynamic Range (1kohms load at 1kHz)96.2 dB
- Preamp Output Clipping Level (1% THD)-6dBV (0.5V)
- Power Requirements11-52 VDC phantom, 2.0mA
More about Shure's Microflex Series
Communicate with confidence with the Microflex® complete digital conference system from Shure. Scalable at 2, 4, or 8 channel groupings (a maximum of 40, dependent on the region), this versatile system’s components include transceivers, an access point transceiver, networked charging stations, and an audio network interface—all with automatic frequency management and using shielded Cat 5e or Cat 6 cables for ease of installation and customization. This system is integrated with AES-256 encryption to keep your meetings secure.
From handheld, gooseneck, boundary, to bodypack (compatible for head-worn or lavalier), the wide variety of transmitters in the Microflex Wireless series allow you to choose what best fits your collaborative style. Each option boasts Commshield technology for RF noise immunity—so you can hear the person speaking into their mic with crystal clarity without distractions. Powered by rechargeable lithium-ion batteries, Microflex transmitters enable you to maintain your meeting’s momentum for up to 8 hours of continuous runtime.
No matter the size of your space, Microflex Wireless is the ideal conference system for any meeting environment, including flexible/divisible meeting rooms, boardrooms, courtrooms, lecture halls, conferences—even remote management and campus-wide installations. Portable, flush-mount and modular units ensure maximum coverage while freeing you up from the worry of wired components.
