Microphone amplifier for pocket transmitters

Product is discontinued.
Alternatives: CMC 1 K, CMC 1 KV, CMC 1 SO

Product is discontinued and no longer available.
Alternatives: CMC 1 SO/K/KV and with adapter also CMC 1 L/U


  • Amplifier for pocket transmitters without phantom power
  • ATTENTION: there are a limited number of compatible transmitters, including Sennheiser, Wisycom and others, see Downloads. Use with digital transmitters is not intended, as interference may occur.

Order number

  • No. 132009


The CMR is an amplifier for use in direct combination with MK capsules and pocket transmitters.

It is designed to draw only approx. 2-4% of the power required by the CMC 6. No 48V phantom power is necessary; instead only a supply voltage/current of 4V/1mA is required, as is generally provided by most pocket transmitters for driving electret capsules.



The CMR allows an MK capsule to be used with pocket transmitters. As with electret microphones, only a very low supply current is required, yet the CMR offers low output impedance and good immunity to interference.
The biggest benefit of all, however, is SCHOEPS' well-known sound quality, which this amplifier delivers fully.

The robust connecting cable is reinforced with Kevlar fibers. It remains flexible at low temperatures, and does not twist.

The CMR can be used with devices which provide 1 mA for a microphone at 4 Volts or higher. The current list of compatible devices can be viewed at the compatibility chart in the downloads below.

Technical Specifications


ca. 4.5 dB less (60%) than the corresponding capsule with CMC 6

Maximum output voltage

0.9 V (-1dBV) with 20 kΩ load

0.56 V (-5dBV) with 2 kΩ load

Low cut filter


Minimum recommended load impedance

5 kΩ

Output impedance

at 1kHz: 15 Ω



Powering standard / Valid range

4 -10 V

Current consumption

1 mA


Custom connector, analog, 1 channel, unbalanced


assembled according to customer's specification

Length of the output cable

Standard length: 2m; other lengths possible

Diameter of the output cable

3 mm


38 mm


20 mm


25 g

Surface finish

matte gray (g) or custom color



A microphone amplifier for pocket transmitters

Product sheets

de | en
Compatibility chart

list of the CMR compatible pocket transmitters

User guides, manuals


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