Schoeps CMC6U Microphone Amplifier

From: $779.00

The Schoeps CMC6U is designed for standard 48- and 12-Volt phantom powering. Its circuitry recognizes the supply voltage and adjusts itself automatically.

Clear

Description

  • flat frequency response
  • very low harmonic distortion and noise
  • works with 12V and 48V phantom power
  • balanced, low-impedance output
  • high suppression of interference on the microphone cable
  • excellent protection against high-frequency radio interference with RFI Shield
  • frequency-independent impedance
  • signal transmission possible over very long cables
  • reliable operation even with weak phantom power
  • symmetrical, transformer- and capacitor-free output stage with a class-A amplifier
  • above 20 kHz, the signal is attenuated for protection against interference in the ultrasonic range, e.g. through the ultrasonic autofocus of a film camera

The capsules of condenser microphones can’t be connected directly to microphone cables or inputs; a microphone amplifier is required in between. Thus a complete microphone of the Colette series comprises any of the twenty available types of capsules combined with an amplifier. The CMC 6 U is designed for standard 48- and 12-Volt phantom powering. Its circuitry recognizes the supply voltage and adjusts itself automatically. Its performance characteristics remain essentially the same either way; mainly, the difference is that the current drawn at 12 Volts is greater than at 48 Volts. However, the 12-Volt mode consumes less power and might be preferred for battery-powered recording.

The microphone amplifier is responsible for providing the necessary electric charge to the capsule, without which it would be unable to generate a signal. Since the capsule’s output signal is very weak (Hi-Z), it must be amplified. In order for the microphone’s output to cleanly reach the next stage in the signal chain, it must undergo balancing and impedance matching before transmission. The CMC 6 incorporates a balanced, direct-coupled class-A amplifier, yielding a low output impedance, high RF shielding, and minimal distortion.

Specifications

Low cut filter

Frequency range 20 Hz – 20 kHz
Sensitivity see corresponding capsule
Maximum output voltage 1 V (0 dBV) with 1 kΩ load
20 Hz, 12 dB/oct.
Minimum recommended load impedance 1 kΩ
Maximum sound pressure level (THD < 0.5 %) with MK 4: 131 dB-SPL (P48, P12)
Output impedance 42 Ω
Maximum cable length > 400 m / ~1300ft
SCHOEPS RFI Shield Yes
Powering standard / Valid range
  • P48 / 20-52 V
  • P12 / 10-13 V
Current consumption
  • 4 mA (P48)
  • 8 mA (P12)
Common mode rejection ratio (at 1 kHz) > 55 dB
Output XLR-3M, analog, 1 channel
Length 116 mm / ~4,5″
Diameter 20 mm / ~0,8″
Weight 60 g / 2,1 oz