An ideal reference mic for measuring frequency response and sound pressure levels.

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.

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Beyerdynamic MM 1 Measurement Microphone Features:

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

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 - 20,000 Hz (50 - 16,000 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