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Microtech Gefell M990 Cardioid Tube Condenser
The M 990 is renowned for its high sensitivity and excellent signal-to-noise ratio. It combines modern large diaphragm 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 new pressure gradient transducer of the M 990 uses a large diameter gold-plated plastic diaphragm. The vacuum tube preamplifier is equipped with a pentode working as a triode selected for its sonic characteristics.
The N 920.1 power supply provides the operating voltage for the vacuum tube condenser microphone. It can be powered from AC mains with a primary voltage of 115 or 230 volts / 50 or 60 Hz.
For cable lengths over 50 meters it is recommended to have your service provider set the heater voltage of the power supply to 5.8 volts. The N 920.1 is equipped with an on/off-switch, a 7-pin Tuchel connector that powers the microphone and a 3-pin XLR connector with integrated line voltage selector.
The M 990 is packed in a wooden case and comes with power supply , connection cable C 92.1 and elastic suspension EA 92.
The microphone is available in a dark bronze finish.
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Tube-Condenser Microphone
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M 990
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Polar pattern
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cardioid
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Acoustical operating principle
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Pressure gradient transducer
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Frequency range
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40 ... 18000 Hz
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Sensitivity at 1 kHz
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28 mV / Pa
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Rated impedance
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200 Ω
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Equivalent loudness level
due to inherent noise |
CCIR 468-4 (qps)
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24 dB
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DIN EN 60651
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13 dB - A
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Signal-to-noise ratio
(re 1 Pa at 1 kHz) |
CCIR-weighted
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70 dB
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A-weighted
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81 dB
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Max. SPL for THD ≤ 0,5 %
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119 dB
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Total dynamic range of the microphone amplifier
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106 dB
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DC power supply
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120 V -
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Anode current
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1 mA -
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Heater voltage
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5,8 V -
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Heater current
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200 mA -
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Tube
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EF 86
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Output connector
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7- pin Tuchel C 70 / A
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Weight
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400 g
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Dimensions (L x Ø )
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185 x 43 mm
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