MM 2
Common name: Neumann MM 2
Production Status: Discontinued / Vintage
The MM 2 is the first measurement microphone manufactured by Georg Neumann GmbH from 1949 to 1954. The microphone derives from the U 47 using the same body and circuit with some modifications and a Telefunken VF 14 M tube. A long neck connects the capsule to the microphone body to avoid sound field perturbation and reflections. A 10 mm calibrated MM 2 small aluminium diaphragm pressure capsule is placed at the neck’s top. The MM 2 uses the same PSU and cables as the U 47 and U 48 microphones. A pistonphone machine was manufactured for measurement microphone calibration. The frequency response was 30 -16,000 Hz +/- 1 d B.
Electrical Characteristics
Frequency Response
30Hz - 16 kHz
Output Sensitivity
1.5 mV/Pa
Max SPL
Max SPL, THD:
Self Noise (CCIR)
dB
Self Noise (DIN/IEC)
dB-A
Output Impedance
200Ω
Recommended Load
1kΩ
Powering
Proprietary unit
Supply Current
mA
Alternative Powering
Tube Model
Telefunken VF14 M
Switchable Options
Pad
Filter/EQ
Physical Characteristics
Connector
Tuchel 3039 (6-pin)
Connector notes
Available Colours
Weight
800 g
Length
Min diameter width
Max diameter
Depth
Accessories
Included
Optional
NG power supply. UC4 cable