Shure BRH31M User Manual page 7

Lightweight single-sided broadcast headset
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Storage Temperature
Relative Humidity
Microphone
Type
Dynamic, Neodymium magnet, 12.5 mm
Polar Pattern
Cardioid
Frequency Response
50 to 15,000 Hz
Output Impedance
150 Ω
Sensitivity
at 1 kHz, open circuit voltage
-66.5 dBV/Pa* (0.47 mV)
Polarity
Positive pressure on diaphragm produces positive voltage on red wire with respect to black wire.
Headphone
Transducer Type
Dynamic, Neodymium magnet
Driver Size
30 mm
Frequency Response
150 to 12,000 Hz
Sensitivity
@ 1 kHz
101 dB SPL/mW
Impedance
@ 1 kHz
220 Ω
Maximum Input Power
200 mW
-29° to 74° C (-20° to 165° F)
0 to 95%
Shure Incorporated
7/10

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