Specifications

34
Microphone Amplifiers
Technical Specifications:
Low-cut fre-
Amplifier type Powering Current consumption Impedance quency (-3 dB)
CMC 6, -6xt: 12 V ± 1 V phantom 8 mA 25 Ohms 20 Hz
48 V ± 4 V phantom 4 mA 35 Ohms 20 Hz
(automatically switched)
CMC 5: 48 V ± 4 V phantom 4 mA 35 Ohms 30 Hz
Maximum output voltage: 1 V (at 1 kHz and 1 kOhm load resistance)
Minimum recommended load impedance: 600 Ohms (If a lower load impedance is used, the main effect
will be to reduce the maximum output level of the microphone.)
Length: 116 mm (incl. 3 mm capsule thread)
Diameter: 20 mm
Weight: CMC 5: 63 g; CMC 6 / 6xt: 60 g
Surface finish: matte gray (g) or nickel (ni)
Other surface finishes available on request.
Current consumption of microphones :
The current required by the SCHOEPS class “A“ output
circuit falls well within the 10 mA limit set by the pre-
vailing standard (DIN EN 61938, July 97). However,
certain commercially available power supplies, pream-
plifiers, and mixing desks – mostly older, but some
more recent – may fail to meet this standard. Such
units may not be able to power SCHOEPS microphones
adequately, especially where headroom at high SPL is
desired. Where doubt exists, equipment should be
checked to verify its suitability for professional work
with SCHOEPS microphones.
The PHS 48 accessory test plug can be helpful in
testing equipment quickly and easily to see whether it
is compatible with SCHOEPS 48-Volt phantom-powered
microphones.
amplifier version with extended high-frequency response)
are shown on page 135.
CMC ”+5 dB”
The sensitivity of a microphone using this type of
ampli fier is 5 dB higher than with the standard version,
but the equivalent noise level and maximum output
voltage are not materially affected. Thus the highest
sound pressure level which the microphone can accept
without distortion is 5 dB lower than in the standard
version, while the signal-to-noise ratio is essentially the
same with either gain setting.
This version might be chosen in order to raise the
microphone's signals above the noise level of the
equipment to which it will be connected, and / or for
working with sounds that occur mainly at low levels.
Accessories (included with all CMC versions):
polished wood case for two microphones, SG 20 stand
clamp with swivel