Microtech Gefell M990 Microphone

Microtech Gefell M990 Microphone 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.

• high sensitivity
• excellent signal-to-noise ratio
• modern M930 capsule
• large diameter gold-plated plastic membrane
• tube preamplifier with EF86

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.

Tube-Condenser Microphone M 990 Polar pattern cardioid Acoustical operating principle Pressure gradient transducer Frequency range 40 … 18000 Hz Sensitivity at 1 kHz 28 mV / Pa Rated impedance 200 Ω 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

Frequency Responses

Polar Patterns