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Gefell UMT800 FET Microphone  From Gefell

Large diaphragm, transformerless multi-pattern studio microphone

Microtech Gefell


Retail:  $3,600.00

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Manufacturer's Description from Gefell

The Gefell UMT800 is a large diaphragm FET studio condenser that combines the legendary M7 capsule with a symmetrical, transformerless pre-amp for exceptional detail and reach, while allowing sound pressure levels to 149dB. With five patterns to choose including omnidirectional, wide cardioid, cardioid, hyper-cardioid and figure-8, the UMT800 provides outstanding flexibility making it ideal for voice, solo instrument, television broadcast and motion picture scoring stages.

Using the UMT800

The UMT800 is a side-address condenser. Using the UMT800 is a simple matter of connecting an XLR mic cable and turning the 48V phantom on. The on-mic controls are simple and intuitive. Stand mounting the UMT800 is best achieved with the optional EA92 elastic suspension. This elastic "cage" screws into the UMT800's machined base securing the mic for placement at any desired angle. A swivel mount adaptor is also available for mounting on stereo bars and other mic-stand adaptors. With a full compliment of polar patterns, an extended bandwidth, and its unmatched level handling, the UMT800 offers unlimited recording options, opening the door to creative new ideas without worry of overload or distortion.

In cardioid or hypercardioid settings, the UMT800 is the perfect choice for near-field close-mic'ing of instruments and voice. When using the UMT800 on voice, a pop filter or the optional W76 windscreen is recommended. Inserting the pad allows the UMT800 to be used in extremely high sound pressure environments such as drums and percussion.

The cardioid, wide-cardioid and omni settings open the door to full orchestration in far-field, stereo XY, ORTF, Decca-tree and other popular configurations. The higher sensitivity ensures greater detail and articulation, attributes that are especially useful in highly ambient environments. And as with any "great mic" applications are only limited by one's imagination!


The multi-pattern Gefell UMT800 is a world-class studio condenser that combines the warmth and detail of the famous M7 capsule with a highly dynamic, low noise FET capsule amplifier. This results in a microphone with an exceptionally well-balanced response curve, with the added sensitivity and explosive headroom to adapt to virtually any application.

As our most flexible microphone, the UMT800 is ideal for voice, solo instrument, choral, orchestral and broadcast where a full-bodied sound with minimal coloration, and added articulation is required. The exceptional 149dB handling coupled with its impressive low noise-floor also makes the UMT800 an ideal choice for foley stages and location sound in film, television broadcast and live sound stages where source material is infinite and a "single mic" solution is required. Comes in it's own beautiful hand-crafted wood case.

Microtech Gefell

About Manufacturer

Since its founding by Georg Neumann in 1928, the company has produced high quality, condenser microphones for broadcasting and recording. Many models have used the M7 capsule originally designed by Mr. Neumann in 1949 for the CMV563a. The M7 was responsible for the legendary sound of the Berlin manufactured U47, U48 and M49 microphones. Today, under the technical supervision of Mr. Kuehnast's son, the Company still produces the M7 capsule in exactly the same way Mr. Neumann taught the elder Kuehnast in the 1940's. Hand drilling each hole in the backplate, making the PVC membrane, and even gluing it together by hand is done just as Mr. Neumann specified. The M7 is currently used in the UM 92.1S, UMT800, UMT70S and MT71S Gefell manufactured microphones.

Some of the production equipment which Microtech Gefell GmbH uses for capsule production capitalizes on advanced technology developed by the Soviets before Perestroika. One of the more recently developed microphones, the M300, uses a capsule made of ceramic material molded under high pressure and plated with chromium. This technology was developed in Moscow using advanced computer modeling and simulation techniques. Gefell perfected a capsule manufacturing process unlike any employed in making Western microphones.

The SMS70 series of microphones designed in the early 1970's used a hybrid amplifier with an fet stage. Hybrid technology was not adopted by manufacturers of Western microphones until the late 1980's. Microtech's newest amplifier for the UMT70S series microphones uses surface mount device (SMD) technology.

The company also manufactures a complete line of measurement microphones equivalent to those of Bruel & Kjaer, the Danish manufacturer. These microphones are tested to the highest standards currently used in the West. The manufacturing methods for the nickel membranes and backplate assemblies are highly advanced. Testing each microphone takes a minimum of three months to guarantee performance and stability when it leaves the factory.

Before the Reunification of Germany the company manufactured their studio and broadcast microphones for RFT, a state agency that distributed them to customers in the Eastern Bloc. Most of the microphones went into the broadcast system. Some microphones, like the PM 860, went into public address systems. Virtually every town hall and auditorium in the former Soviet Union has one. About 1985, the Company began developing high powered (30 to 100 Watt) industrial lasers. They still use a laser engraving machine to put the name and serial numbers onto microphones and other finished metal products. During this period, the East German government poured 60 Million Ost Mark into the company allowing them to buy sophisticated equipment and construct a new building.


Pattern: Omni, wide, cardioid,hyper, figure 8

Response: 40Hz ~ 18kHz

Sensitivity: 13mV/Pa

Level / Roll off: -10dB @ 90Hz

Self noise: 14dB-A

Signal to noise: 80dB-A

Maximum SPL: 149dB with 10dB pad

Dynamic Range: 121dB

Power requirement: 48V Phantom