• Transducer principle: Capacitor (back electret)
• Operating principle: Pressure transducer
• Polar pattern: Omnidirectional
• Frequency response: 20 - 20,000 Hz (50 - 16,000 Hz ± 1.5 dB)
• Diffuse field equalised Field leakage transmission factor at 1 kHz (0 dB = 1 V/Pa) 15 mV/Pa (= -36.5 dBV) ± 1 dB
• Nominal impedance: 330 ohm, nominal terminating impedance = 2.2 kohm
• Max. Maximum sound pressure level at 1 kHz: 128 dB
• S/N ratio related to 1 Pa: > 57 dB
• A-weighted equivalent sound pressure level: approx. 28 dB(A)
• Power supply: 12 - 48 V phantom power
• Supply current: approx. 3.4 mA
• Connector plug: 3-pin XLR
• Dimensions: Length 133 mm, Shaft diameter 19 mm, Head diameter 9 mm
• Weight without cable: 88 g

The beyerdynamic MM 1 is a high-quality electret condenser measurement microphone with omnidirectional polar pattern and calibrated field leakage transmission factor.

Thanks to the slim housing with the offset microphone capsule, the influence on the sound field is very low, so that pressure build-up at high frequencies is largely avoided. The linear frequency response ensures neutral imaging.

The MM 1 microphone was developed for calibrating PA and PA systems. In conjunction with a spectrum analyser, the sound pressure level of loudspeakers can be monitored in addition to frequency response measurements. The MM 1 is a valuable tool for analysing sound signals in research, development and industry.

Each microphone comes with a printout of an individually measured 0° frequency response.