Schoeps CMC 6U xt

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CMC 6

MICROPHONE AMPLIFIER

Its electrical properties have set new standards in terms of low distortion levels and common mode rejection (i.e. suppression of interference induced in the microphone cable).

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

Maximum sound pressure level (THD < 0.5 %)	with MK 4: 131 dB-SPL (P48, P12)
Frequency range	20 Hz - 20 kHz
Sensitivity	see corresponding capsule
Maximum output voltage	1 V (0 dBV) with 1 kΩ load
Low cut filter	20 Hz, 12 dB/oct.
Minimum recommended load impedance	1 kΩ
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
Surface finish	matte gray custom color: nickel, chromagreen

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