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Gefell M990

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 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 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.
Features
  • high sensitivity
  • excellent signal-to-noise ratio
  • modern M930 capsule
  • large diameter gold-plated plastic membrane
  • tube preamplifier with EF86
  • Specifications
    Polar pattern:
    cardioid

    Acoustical operating principle:
    Pressure gradient transducer

    Frequency range:
    40 ... 18000 Hz

    Sensitivity at 1 kHz:
    28 mV / Pa

    Rated impedance:
    200

    Equivalent loudness level due to inherent noise:
    CCIR 468-4 (qps): 24 dB
    DIN EN 60651: 13 dB - A

    Signal-to-noise ratio (re 1 Pa at 1 kHz):
    CCIR-weighted: 70 dB
    A-weighted: 81 dB

    Max. SPL for THD 0,5 %:
    119 dB

    Total dynamic range of the microphone amplifier:
    106 dB

    DC power supply:
    120 V

    Anode current:
    1 mA

    Heater voltage:
    5,8 V

    Heater current:
    200 mA

    Tube:
    EF 86

    Output connector:
    7- pin Tuchel C 70 / A

    Weight:
    400 g

    Dimensions (L x Ø ):
    185 x 43 mm
    Reviews
    Price *
     
    sale_price $3132.00
    Free shipping in Canada. Conditions
    Additional information
    For more information about the M990, please visit the website of Gefell
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