Microphone amplifiers Impedance converter. In addition to the standard, phantom-powered CMC 6 amplifier type, SCHOEPS also offers the CMC 6xt type for recordings up to 40 kHz and the CMR type for use with pocket transmitters.

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Microphone amplifier for pocket transmitters
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 section of SCHOEPS’s web page on this product.

Technical specifications

Technical Specifications

Sensitivity 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
Output Custom connector, analog, 1 channel, unbalanced
Connector assembled according to customer’s specification
Length of the output cable Standard length: 2m; other lengths possible
Diameter of the output cable 3 mm
Length 38 mm
Diameter 20 mm
Weight 25 g
Surface finish matte gray (g) or custom color