Microtech Gefell M 221
- condenser microphone
- measurement quality capsule
- nickel diaphragm
- transistor pre-amplifier
- phantom powering P48
The condenser microphone M 221 unifies universal small diaphragm capsule technology with a metal diaphragm and a modular preamplifier. The use of a certificated measurement capsule combined with a preamplifier with 48 V phantom powering reaches a constant magnitude and phase response and transmission properties which are long-term stable.
Because of the small capsule dimensions, the M 221 is ideally suited for applications where a low interference with the sound field is demanded. It is usable as a main microphone for recordings which should include a certain amount of the room response. As well the M 221 is suited as a spot microphone for recording instruments very close to where the low frequencies should be transmitted in detail and original. Moreover, it can be used for multichannel main microphone arrangements like AB stereophony or Decca tree. For these applications, the microphone is ideal because of its precise and long-time stable transmission properties. The M 221 has an excellent transient response because of the pressure transducer capsule and is really suitable to record instruments with extreme transients. With both different-sized spherical corpuses, a high-frequency accentuation can be produced in an acoustical way to increase the presence and compensate for the high-frequency roll-off in the diffuse sound field. The M 221 can operate also in unfavorable climate conditions especially referring to the temperature and air humidity for which the accessory humidity adaptor TA 202 is purchasable.
The use of the M 221 with the acoustical equalization ball KA 3 affects a frequency response accentuation which begins at approximately 1 kHz and goes constant at 3 dB from approximately 4 kHz up to 12 kHz. With the acoustical equalization ball, KA 4 the accentuation of the high frequencies starts also at approximately 1 kHz and goes constant at 3 dB between 3 kHz and 12 kHz.
|Acoustic operating principle||pressure transducer|
|Frequency range||20 Hz to 20.000 Hz|
|Sensitivity at 1 kHz||50 mV/Pa|
|Output impedance||100 Ohm|
|Noise level||CCIR 468-4||28 dB|
|DIN EN 60268-4||15 dB-A|
|Signal-to-noise ratio||A-weighted||79 dB|
|SPL for THD 0,5 %||136 dB|
|Max. output level||R = 1 kOhm||18 dBu|
|R = 10 kOhm||19 dBu|
|Dynamic range||121 dB|
|Current consumption||5,5 mA|
|with microphone holder MH 93.1 and acoustical equalization ball KA 3 and KA 4 in wooden case 275 mm x 90 mm x 70 mm|