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Microtech Gefell UM900-EA92
5-Pattern Tube Microphone with EA92 Shock Mount

OUR PART #:  UM900-EA92

Microtech Gefell's UM900 is the only studio tube microphone to employ 48V phantom power as its power source.
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Microtech Gefell EA92 Shock Mount in Dark Bronze
Microtech Gefell EA92 Shock Mount in Satin Nickel
Microtech Gefell UM900 with EA92 Mount and Case

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Selected Model Price: $5,236.73
List Price: $5,263.50

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Microtech Gefell UM900-EA92
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Microtech Gefell's UM900 is the only studio tube microphone to employ 48V phantom power as its power source.  This combination of large diaphragm tube sound and the freedom of phantom powering offer flexibility of placement for recording, broadcast and live sound.

The "eye" of the UM900 is the M7 dual membrane 1" (25 mm), 24-karat gold evaporated capsule.  Hand-made using a PVC substrate, the M7 capsule is mounted on a triangulated pedestal behind a large 75mm head-grill.  The side-address grill differs from the usual cylinder or wedge-shaped design, which results in less field disruption while allowing the user to take full advantage of the proximity effect to enhance the voice.  The UM900's "bottle-top" look is augmented with a sculpted body that deflects unwanted refractions away from the capsule.  This reduces phase cancellation and comb-filtering, which of course yields greater detail at the capsule, all of which play an important role in shaping the sound this microphone.  Internal dampening reduces vibration borne noise further optimizes performance.

The heart of the Gefell UM900 is a miniature "hearing-aid" audio tube and its unique phantom powering system.  Using proprietary circuitry, an internal switching power supply generates voltages for the tube's plate and filament as well as the capsule polarizing voltage.  Unlike traditional tube microphones, the UM900 Phantom does not require an external power supply box or multi-pair cable.  At less than 4-milliamp draw, all that is required is the typical 48V phantom from any console or pre-amp.

Microtech Gefell's UM900 features 3 on-board control switches.  At the front, a pattern selector switch offers choice of omnidirectional, wide-cardioid, cardioid, hypercardioid and figure-8 providing the user with tremendous options.  2 additional control switches located at 120º off each side are used to control gain (-10dB, 0db and +4dB) and low-frequency roll-off (-10dB @70Hz).  The unique +4dB gain setting works with the cardioid pattern to provide additional reach in studio or live environments.

NOTE: Available in satin nickel and dark bronze finishes. Comes with EA92 shock mount and metal carrying case.

Features:

  • 5-switchable patterns
  • Deflects unwanted reflections away from the diaphragm
  • Smooth & versatile for serious recording
  • -10dB pad
  • 70Hz roll-off switch

Specifications:

  • Polar patterns: omni, wide cardioid, cardioid, hypercardioid, fig-8
  • Acoustical operating principle: Pressure gradient transducer
  • Large diameter membrane capsule: dual membrane
  • Frequency range: 40 Hz - 18 kHz
  • Sensitivity at 1 kHz: 25/ cardioid 40 mV/Pa
  • Level selector switch: - 10/ cardioid +4 dB
  • Switch position "reduced bass roll-off" at 70 Hz: - 10 dB
  • Rated impedance: 30 ohms
  • Equivalent loudness level due to inherent noise:
    - CCIR 468 - 4: 26dB
    - DIN EN 60651: 16 dB - A
  • Signal - to - noise ratio (re 1 Pa at 1 kHz):
    - CCIR - weighted: 68dB
    - A - weighted: 78 dB
  • Max. SPL for THD = 0.5 %: 130 dB
    with 10 dB preattenuation: 140 dB
  • Total dynamic range: 114 dB
  • Current consumption (P 48, DIN 45596, IEC 268 - 15): 4 mA
  • Sub - miniature valve: low noise version
  • Output connector: 3 - pin XLR connector, goldplated contacts
  • Weight: 900 g
  • Dimensions (L x Ø): 200 mm x 75 mm
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