CMC -- Microphone Amplifiers
...are distinguished by:
– flat frequency response
– low noise and distortion
– balanced, symmetrical, very low-impedance output
– ability to be used with very long cables (e.g. several hundred meters)
– versions for various powering schemes
Several standard versions are available. All feature a symmetrical, class-A output stage which uses neither coupling condensers nor an output transformer. This leads to a low output impedance, insensitivity to electrical interference, low distortion and light weight.
CMC amplifiers are electrically active components which require operating current. This will most often be supplied by the inputs of a mixer, preamplifier or recorder that has suitable microphone powering built in. Otherwise, a stand-alone microphone power supply of proper type can be used.
Phantom Powering
Most modern, solid-state professional microphones use a standardized powering scheme known as ”phantom powering,” and most recording equipment offers a 48-Volt supply for such microphones. Some equipment, however, provides a 12-Volt supply for phantom powering, or can be readily modified to provide such a supply. The SCHOEPS CMC 6 amplifier series can work with either voltage, switching its circuitry automatically to the corresponding mode of operation. It maintains the same level of performance in either mode, while drawing only the necessary amount of current from the phantom supply.
Note that the CMC 6 is designed to work with standard 12-Volt or standard 48-Volt phantom powering, but it is not a ”12-to-48 Volt” microphone. Any input to which it is connected must implement one of those two standard phantom powering methods. Not only must the supply voltage meet the standard; the resistors must be correct as well.
Rating: 4.8
919-682-5552