The Mx393 Microflex™ Wired Boundary Microphone From Shure Is Equipped With A Programmable, Silent Membrane Switch And Green Led Indicator. It Is A High-Quality Solution For A Range Of Applications Such As Altars, Boardrooms And Distance Learning Centers. Includes Miniature Three Pin Connector And 12' Xlr Cable.

All Measurements Taken With Microphone Mounted On A Wooden Surface 76.2 Cm X 76.2 Cm (30 In. X 30 In.).

Frequency Response
50 To 17,000 Hz

Polar Pattern
Supercardioid

Output Impedance
Eia Rated At 150 Ohms (180 Ohms Actual)

Sensitivity (At 1 Khz, Open Circuit Voltage)
Supercardioid Cartridge: -26.5 Dbv/Pa (47.3 Mv)
1 Pascal=94 Db Spl

Maximum Sound Pressure Level (1 Khz At 1% Total Harmonic Distortion, 1 K Ohm Load)
Supercardioid: 116.0 Db

Signal To Noise Ratio (Referenced At 94 Db Spl)
Supercardioid: 72.0 Db

Equivalent Output Noise (A-Weighted)
Supercardioid: 22.0 Db Spl

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.

Power Requirements
11 To 52 Vdc Phantom
2.0 Ma Current Consumption

Environmental Requirements
Operating Temperature Range: -18 To 57 Degrees C (0 To 135 Degrees F)
Relative Humidity: 0 To 95%