BRH31M

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Net Weight (without cable) 81 g (2.9 oz)
Cable Fixed, Single-Sided, 5-conductor, Unterminated cable (1.8 m)
Microphone  
Type Dynamic (moving coil)
Polar Pattern Cardioid
Frequency Response 100 to 12,000 Hz
Output Impedance 200 Ohms
Sensitivity (@ 1 kHz, open circuit voltage) -64.0 dBV/Pa* (0.45 minimum) *1 Pa -94 dB SPL
Polarity Positive pressure on diaphragm produces positive voltage on pin 1 (red wire) with respect to pin 3 (shield)
Headphone  
Transducer Type Dynamic, Neodymium magnet
Driver Size 30 mm
Frequency Range 150 to 12,000 Hz
Sensitivity (@ 1 kHz) 101 dB/mW
Impedance (@ 1 kHz) 220 Ohms
Maximum Input Power 200 mW