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25.02.2021

From Moscow with love – the unusal all in one mic with a remarkable history

M 900 - an exotic-looking high-end microphone with an interesting history

PM 860, the predecessor of the M 900/M910

The huge increase in demand from the Soviet market in the 80s led to an increased interest in cooperation, especially in the development of new microphone capsules. This led to the development of a new condenser mic, the PM 860, the predecessor of the M 900/M910.
PM 860, the predecessor of the M 900/M910 The huge increase in demand from the Soviet market in the 80s led to an increased interest in cooperation, especially in the development of new microphone capsules. This led to the development of a new condenser mic, the PM 860, the predecessor of the M 900/M910.

Gefell, 25.02.2021 (PresseBox) - The cardioid condenser mic M 900 (and its hypercardioid cousin M 910) is not only striking in appearance, it also has remarkable historical roots.

Microphone technology from the limited partnership Georg Neumann & Co. was already in great demand in Eastern Europe in the 1950s and 1960s. This did not change after the expropriation in 1972. Renamed VEB Mikrofontechnik Gefell and under the new brand name "RFT", enormous quantities of Gefell products continued to be sold in Eastern Europe. Thousands of mics were were mostly exported to the Eastern European countries that belonged to the Council for Mutual Economic Assistance (CMEA) and primarily to the former Soviet Union.

Gefell Mics, usually known in Russian as Neumann Gefell mics, were used in all areas of cultural life.

The huge increase in demand from the Soviet market in the 80s led to an increased interest in cooperation, especially in the development of new microphone capsules. This led to the development of a new condenser mic, the PM 860, the predecessor of the M 900/M910. 

The PM 860 was developed in cooperation between the russian NIKFI (Research Film and Photography Institute) and the RFZ (Rundfunk und fernsehtechnisches Zentralamt - institution for broadcast and television) in Berlin and has been produced in larger quantities in1986.

The NIKFI,  established in 1929, is an international wellknown R&D center including acoustics. In 1991, for example,  NIKFI was awarded prestigious "Technical Achievements Award" by US Motion Pictures Academy (Oscar’s).

The Institute`s  excellent acoustics laboratory became the cooperation partner in the 80s. The main activities, then and now, among others include the development and production of studio mics.

In partnership with specialists of the NIKFI-acoustics laboratory, a ceramic capsule 24 mm was developed and used in the PM 860,  in Russian also called the "German grenade" because of its special design, was a great success on the Soviet market.

M 900 / M910 - The next generation

The M 900 and M910 are  a great sounding condenser mics, super clean and clear,  soft and the low color backfield on them is startling. It`s ideal for both hand-held broadcasting, stage use, as well as recording instruments and soloists in the studio in the professional market.

Its well balanced frequency response in the free field as well as in the diffuse field and the appropriate distinct characteristics ensure clean and colourless recordings of any sound sources with good selectivity. It is advisable to use the M 910 by soloists because it shows especially optimised frequency response for this kind application.

A distance of less than 8 to 12 inches, which is recommended as minimum distance between lips and mic, causes acoloration with an emphasis of lower frequencies, the proximity effect. An acoustic filter integrated in the protective basket reduces the popsensitivity.

The direction of maximum sensitivity is axial, i.e. endwise to the mic. This fact and the ergonomic design make this mic the right choice for live performance of soloists.

Following the modern trend of technique the transducer is equipped with a gold plated polyester membrane.The newly developed transformerless impedance transducer having a balanced output stage guarantees a high output capability and low intrinsic noise.

Together with the high qualities of the ceramic mic capsule a high brillance of the live performance is reached. A 10 dB attenuator is installed to reduce the sensitivity of the mic when placed near extremely loud sound sources.

And a low frequency roll-off switch will reduce the proximity effect when close miking. The two switches are sunk placed in the middle of the amplifier.

Frequency response is as 20 Hz to 20 kHz. Sensitivity is 17mV/Pa. Due its tighter pattern, the hyper-cardioid M 910 version is slightly less sensitive, at 14mV/Pa. The active transformerless output removes the limitation on the output capability that would be imposed by a transformer.

 

Ansprechpartner

Dipl.-Ing. Udo Wagner
+49 (0) 36649 882-20
+49 (0) 36649 882-11
Zuständigkeitsbereich: Sales Director

Über Microtech Gefell GmbH:

Acoustic measurement technology since 1928

The Microtech Gefell GmbH is manufacturer of high quality, handmade measurement and studio microphones founded 1928 by Georg Neumann.

Besides the company offers calibration and services for all manufactured products.

The Measurement technology includes 1", ½" and ¼" measurement capsules, measurement preamplifiers for different connection techniques (Conventional Lemo, ICP®, Phantom P 48 XLR, Digital USB AES 42 XLR), outdoor and environmental microphones, microphone arrays, sound intensity probes, power supplies, calibration devices as well as turnkey solutions (e.g. special test benches for car acoustics).

Datei-Anlagen:


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PM 860, the predecessor of the M 900/M910 The huge increase in demand from the Soviet market in the 80s led to an increased interest in cooperation, especially in the development of new microphone capsules. This led to the development of a new condenser mic, the PM 860, the predecessor of the M 900/M910.


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She likes it - Bettina Meske Bettina Meske is a true Berliner. She completed her training at the dance-singing studio of the Theater an der Wien and as a singer, actress, songwriter and producer she looks back on engagements all over Europe. Whether in DER TUNNEL (The tunnel), HOW TO SUCCEED IN BUSINESS WITHOUT REALLY TRYING, LES MISÈRABLES or TIMM THALER she can always convince the audience. She is a member of the German Musical Academy and was awarded the German Musical Theatre Prize.


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The NIKFI, established in 1929 is an international wellknown R&D center, including acoustics. In 1991, for example, NIKFI was awarded prestigious "Technical Achievements Award" by US Motion Pictures Academy (Oscar’s). The Institute`s excellent acoustics laboratory became the cooperation partner in the 80s. In partnership with the NIKFI, a ceramic capsule 24 mm was developed and used in the PM 860, in Russian also called the "German grenade" because of its special design.


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A Friendship meeting at NIKFI 25 years later - the MTG sales manager and Russian project participants, involved in the ceramic capsule development for PM 860


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In partnership with specialists of the NIKFI-acoustics laboratory, a ceramic capsule 24 мм was developed and used in the PM 860. The technical management of the project in Gefell was taken over by Jochem Kühnast, the son of Erich Kühnast, who was a close partner of Georg Neumann.


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The high-end mic M 900 - successor of the PM 860 The M 900 and M910 are a great sounding condenser mics, super clean and clear, soft and the low color backfield on them is startling. It`s ideal for both hand-held broadcasting, stage use, as well as recording instruments and soloists in the studio in the professional market.


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M 900 cardioid + M 900 supercardioid Its well balanced frequency response in the free field as well as in the diffuse field and the appropriate distinct characteristics ensure clean and colourless recordings of any sound sources with good selectivity.It is advisable to use tis mics by soloists because it shows aspecially optimised frequency response for this kind application.


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Frequency response is as 40Hz to 18KHz. Sensitivity is 17mV/Pa. Due its tighter pattern, the hyper-cardioid M 910 version is slightly less sensitive, at 14mV/Pa. The active transformerless output removes the limitation on the output capability that would be imposed by a transformer.


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The artist duo Andreas Schäfer and Claudia Gahrke (http://www.astronautenkost.org/) presented works by the Wuppertal poet Else Lasker-Schüler in Stockholm, Zurich, Paris, New York and Los Angeles.


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The M 900 + M 910 at a glance: ▪ ideal for vocal and instrumental soloists ▪Ceramic electrode with gold-coated polyester diaphragm ▪Acoustic filter integrated in the protective basket


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[PDF] M-900 + M 910 datasheet


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[PDF] The MTG-microphones belong to specific sectors in Broadcast & Recording as well as Live-Sound & Installation. The Broadcast & Recording sector covers microphones especially developed for studio, for the recording of instruments, speech or singing. Here there is a specific choice between large diaphragm tube microphones– or small membrane transistor microphones. In the Live-Sound & Installation sector, microphones often integrated with Live-show sound, or in fixed acoustic installations.