The Beyerdynamic MM 1 is a measurement microphone designed specifically for measuring sound reinforcement and PA systems. It is designed to work with spectrum analyzers for measuring frequency response and sound pressure levels of loud speaker systems. The MM 1 is the ideal microphone for the measurements of audio signals in the research development for reverberation testing and other applications.

The MM 1 mic's narrow tubular construction ensures that the microphone has negligible influence on the sound field so that an increase in pressure level is avoided due to the linear frequency response.

Requires phantom power.

Beyerdynamic MM 1 Measurement Microphone Specifications:

• Transducer type: Condenser (back electret)
• Operating principle: Pressure
• Polar pattern: Omnidirectional diffuse field calibrated
• Open circuit voltage at 1 kHz (0dB = 1V/Pa) : 15 mV/Pa (_ -36.5 dBV) ± 1 dB
• Nominal impedance: 330 Ohms
• Load impedance: 2.2 k Ohms
• Connector: 3-pin XLR
• Length: 133 mm
• Shaft diameter: 19 mm
• Head diameter: 9 mm
• Weight without cable: 88 g
• Frequency response: 20 - 20000 Hz (50 - 16000 Hz ± 1.5 dB)
• Max. SPL at 1 kHz: 128 dB
• S/N ratio rel. to 1 Pa: > 57 dB
• A-weighted equivalent SPL: approx. 28 dB(A)
• Power supply: 12 - 48 V phantom power
• Current consumption: approx. 3.4 mA

Beyerdynamic MM 1 Measurement Microphone Features:

• Linear frequency response
• Omnidirectional polar pattern
• Calibrated open circuit voltage
• Narrow tubular construction

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