Shure MX300 Specifications, Frequency Response Figure, Polar Pattern Figure, Output Impedance

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 Ω (180 Ω actual)

Sensitivity (at 1 kHz, open circuit voltage)

Cardioid Cartridge: ±27.5 dBV/Pa (4.22 mV)

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 kΩ 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 (￿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 3kΩ).

Power Requirements

11 to 52 Vdc phantom

2.0mA current consumption

Environmental Requirements

Operating Temperature Range: ±18° C to 57° C (0° F to 135° F)

Relative Humidity: 0 to 95% Dimensions (Figure 9)

Certification

Conforms to European Union directives, eligible to bear CE marking; meets European Union EMC Immunity Requirements (EN 50082±1: 1992).

REPLACEMENT PARTS

Omnidirectional Cartridge . . . . . . . . . . . . . . . . . . . . . R183

Supercardioid Cartridge . . . . . . . . . . . . . . . . . . . . . . . R184

Cardioid Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . R185

NOTE: For technical data by Fax, phone 1-800-488-3297 and follow the recorded instructions. For additional techni- cal assistance, phone Shure at (847) 866-2200. In Europe, phone 49-7131-72140.

SHURE, the Shure logo, and MICROFLEX are registered trade- marks of Shure Incorporated. Tini Q-G is a registered trademarks of Switchcraft Incorporated.

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