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 aluminum attaché style flight case and comes with power supply N 920.1, connection cable C 92.1 and elastic suspension EA 92.

SPECIFICATIONS

• Polar pattern: Cardioid
• Acoustical operating principle: Pressure gradient transducer
• Frequency range: 40Hz - 18kHz
• Sensitivity @ 1 kHz: 28 mV/Pa
• Rated impedance: 200Ω
• Equivalent loudness level: CCIR 468-4 24dB
• Self Noise: DIN EN 60 651 13dB - A
• Signal to noise: CCIR-weighted @ 70 dB, A-weighted @ 81dB
• Maximum SPL THD < 0.5 % @ 119 dB
• Total dynamic range: 106 dB
• DC power supply: 120 V-
• Anode current: 1 mA
• Tube: EF 86
• Output connector: 7-pin Tuchel C 70/A

Back to top

MANUALS & PDFs

Gefell M990 Manual