Microtech Gefell M 990

Studio Microphone with modern large diaphragm capsule


Microtech Gefell M 990

  • condenser microphone
  • cardioid
  • large diaphragm capsule
  • PE diaphragm
  • tube pre-amplifier
  • with power supply


The M 990 is renowned for its high sensitivity and excellent signal-to-noise ratio. It combines modern large membrane capsule technology with the typical full-bodied sound of tube microphones that are preferred by vocalists and soloists. The M 990 vacuum tube condenser microphone is well-suited for difficult radio play productions as well as a supporting microphone for orchestra recordings. The pressure gradient transducer of the M 990 uses a large-diameter gold-plated plastic membrane.

technical data

Polar pattern cardioid
Acoustic operating principle Pressure gradient transducer
Frequency range 20 Hz to 20.000 Hz
Sensitivity at 1 kHz 28 mV/Pa
Output impedance 200 Ohm
Noise level CCIR 468-4 24 dB
DIN EN 60268-4 13 dB-A
Signal-to-noise ratio CCIR weighted 70 dB
A-weighted 81 dB
SPL for THD 0,5 % 119 dB
Dynamic range 106 dB
DC power supply 120 V-
Anode current 1 mA-
Heater voltage 5,8 mV-
Heater current 200 mA-
Tube (low-noise) EF 86
Output connector 7-polig, Tuchel C 70/A
Weight 400 g
Length 185 mm
Diameter 43 mm

product contents

power supply N 920.1, connection cable C 92.1, elastic suspension EA 92, windscreen W 92, in an aluminum suitcase 450 mm x 350 mm x 160 mm