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SPECIFICATIONS
All measurements taken with microphone mounted on a
wooden surface 76.2 cm x 76.2 cm (30 in. x 30 in.).
Frequency Response (Figure 7)
50 to 17,000 Hz
Polar Pattern (Figure 8)
Cardioid (MX392/C, MX393/C)
Supercardioid (MX392/S, MX393/S)
Omnidirectional (MX392/O, MX393/O)
Output Impedance
EIA Rated at 150 W (180 W actual)
Sensitivity (at 1 kHz, open circuit voltage)
Cardioid Cartridge: --27.5 dBV/Pa (4.22 m V)
Supercardioid Cartridge: --26.5 dBV/Pa (4.73 mV)
Omnidirectional: --22.0 dBV/Pa (7.94 mV)
1 Pascal=94 dB SPL
Maximum Sound Pressure Level
(1 kHz at 1% Total Harmonic Distortion, 1 kW 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 d B
Equivalent Output Noise (A-weighted)
Cardioid: 23.0 dB
Supercardioid: 22.0 dB
Omnidirectional: 17.5 d B
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 (≤1.0v), TTL compatible. Absolute
maximum voltage: --0.7V to 50V.
SWITCH OUT: Active low (≤0.5V), sinks up to 20mA,
TTL compatible. Absolute maximum voltage: --0.7V to
24V (up to 50V through 3kW).
Power Requirements
11 to 52 Vdc phantom
2.0 mA current consumption
Environmental Requirements
Operating Temperature Range: --18° Cto57° C(0° Fto
135° F)
Relative Humidity: 0 to 95%
Dimensions (Figure 9)
Certification
Eligible to bear CE Marking. Conforms to European EMC
Directive 89/336/EEC. Meets applicable tests and
performance criteria in European Standard EN55103
(1996) parts 1 and 2, for residential (E1) and light
industrial (E2) environments.
REPLACEMENT PARTS
Omnidirectional Cartridge R183......................
Supercardioid Cartridge R184.......................
Cardioid Cartridge R185............................
12’ (3.7m) Cable 3-Pin Miniature Connector (TA3F)
to male XLR C119.................................
SHURE, the Shure logo, and MICROFLEX are registered trade-
marks of Shure Incorporated.