By: Shure
Microphones, Headphones & Wireless systems
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Microflex Boundary Microphones
The Shure Microflex Microphone Series MX 392 and MX 393 Microflex® Wired Boundary Microphones from Shure are equipped with features like programmable, silent membrane switches, logic inputs and outputs, and green LED indicators. The high-quality solution for a range of applications such as altars, boardrooms and distance learning centers, Microflex Boundary microphones feature interchangeable condenser cartridges.

MX-392: Surface-mount mic; LED logic input/switch logic output terminals, screw terminal connections, attached unterminated cable MX-393: Surface-mount mic; miniature three pin connector, 12' XLR cable

Flat frequency response across the vocal range for uncolored sound
Interchangeable cardioid, supercardioid, and omnidirectional cartridges that provide choices for applications
Sleek, low-profile design for unobtrusive appearance
Frequency Response 50 to 17,000 Hz
Polar Pattern Cardioid (MX392/C, MX393/C); Supercardioid (MX392/S, MX393/S); Omnidirectional (MX392/O, MX393/O)
Output Impedance EIA Rated at 150 O (180 O actual)
Sensitivity (at 1 kHz, open circuit voltage) Cardioid Cartridge= –27.5 dBV/Pa (42.2 mV); Supercardioid Cartridge= –26.5 dBV/Pa (47.3 mV); Omnidirectional= –22.0 dBV/Pa (79.4 mV); 1 Pascal=94 dB SPL
Maximum Sound Pressure Level (1 kHz at 1% Total Harmonic Distortion, 1 kO load) Cardioid= 117.0 dB; Supercardioid= 116.0 dB; Omnidirectional= 111.5 dB
Signal to Noise Ratio (referenced at 94 dB SPL) Cardioid= 71.0 dB; Supercardioid= 72.0 dB; Omnidirectional= 76.5 dB
Equivalent Output Noise (A-weighted) Cardioid= 23.0 dB; Supercardioid= 22.0 dB; Omnidirectional= 17.5 dB
Dynamic Range 94.0 dB
Common Mode Rejection 45 dB minimum, 10 Hz to 100 kHz
Switch Attenuation 50 dB minimum
Preamplifier Output Clipping Level –6 dBV (0.5 V)
Polarity Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of output connector
Logic Connections (MX392 Only) LED IN= Active low (v1.0v), TTL compatible. Absolute maximum; voltage= -0.7V to 50V.; SWITCH OUT= Active low (v0.5V), sinks up to 20mA, TTL compatible. Absolute maximum voltage: -0.7V to 24V (up to 50V through 3kO)
Power Requirements 11 to 52 Vdc phantom; 2.0 mA current consumption
Environmental Requirements Operating Temperature Range= –18° C to 57° C (0° F to 135° F); Relative Humidity= 0 to 95%

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Prices and specifications subject to change without notice.