Questions? Call Us:

Microtech Gefell UM 92.1S
Tube Condenser Microphone with Switchable Polar Patterns

OUR PART #:  UM92.1S

Microtech Gefell's UM 92.1 S studio microphone features their M7 capsule, a pressure gradient transducer with 2 large-diameter gold-sputtered plastic membranes.
Learn More
Microtech Gefell UM92.1S with Accessories
Microtech Gefell UM92.1S with Accessories
Microtech Gefell Mic to Amp Cable

Click a thumbnail to see more images. (6 total)

Selected Model Price: $3,536.80
List Price: $3,541.00
Write the first review.

Full Compass offers free ground shipping on thousands of stock and non-stock (special order) items for orders placed on this web site and shipping in the continental US (48 states).

Learn More

Free Shipping


We guarantee to match pricing on the products we sell for new, identical and immediately available products if you see them offered at a lower price. Please contact us if you find a lower price before purchasing.

Learn More

Low Price


Microtech Gefell UM 92.1S
Select a Model: (shipping times are approximate)

Similar Products

Microtech Gefell's UM 92.1 S studio microphone features their M7 capsule, a pressure gradient transducer with 2 large-diameter gold-sputtered plastic membranes.

3 directional characteristics - omni-directional, cardioid and figure-8 - are selectable with a pattern selector switch that is mounted on the power supply.  The vacuum tube microphone shows a considerable signal-to-noise ratio and a high sensitivity.  The UM 92.1 S has the typical warm full sound of tube microphones that is commonly preferred by singers and soloists.  The direction of maximum sensitivity is radial to the grill (side addressed).

NOTE: Comes in satin nickel and black matte finishes. Includes power supply, cable, and metal carrying case.

The vacuum tube amplifier uses a pentode working as high ┬Á triode for its sonic characteristics.

The UN 920.1 power supply provides the polarization voltage for the capsule and the necessary DC voltages to the microphone amplifier.  It is recommended to set the heater voltage of the power supply to 5.8 volts for cable lengths longer than 50 meters.  The UN 920.1 can be powered from AC mains with the primary voltage from 115 or 230 volts - 50 or 60 Hz.

Mounted on the front panel are the pattern selector switch and the on/off switch.  Mounted on the rear panel are the AC mains connector (with choice of voltage), the 7-pin Tuchel connector which powers the microphone and a standard 3-pin XLR connector for audio output.


  • Polar patterns: omni, cardioid, figure-8
  • Acoustical operating principle: Pressure gradienttransducer
  • Frequency range: 40Hz - 18kHz
  • Sensitivity at 1 kHz: 15 mV / Pa
  • Rated impedance: 200 
  • Equivalent loudness level due to inherent noise:
    CCIR468-4: 25 dB
    DIN EN 60651: 17 dB - A
  • Signal-to-noise-ratio  (re. 1 Pa at 1kHz):
    CCIR-weighted: 69 dB
    A-weighted: 77 dB
  • Max. SPL for THD 0.5%: 120 dB
  • Total dynamic range of the microphone amplifier: 103 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: 430 g
  • Dimensions: 197 mm x 42 mm

To be the first to review this item, click here.

Add to Cart

We're sorry, only of this item available

Call a Sales Pro at 800-356-5844 for more information

© 2017 Full Compass Systems, LTD  9770 Silicon Prairie Parkway, Madison, WI 53593  All rights reserved.

We are not responsible for typographical errors in pricing or product specification
inaccuracies in our catalog or web site. Prices are subject to change without notice.