SCHOEPS
GmbH · Spitalstr. 20 · D-76227 Karlsruhe (Durlach) · Tel: +49 (0)721 943 20-0 · Fax: +49 (0)721 943 2050
www.schoeps.de · [email protected]
CCM Compact Microphones
3
Technology
Dear customer:
Thank you for choosing a
SCHOEPS
CCM
Compact Series microphone.
CCM microphones are the smallest true
classic condenser microphones (no electret
used) offering the highest possible sound
quality without compromise.
The following pages contain technical infor-
mation, application suggestions and advice
concerning the care and maintenance of these
microphones.
CCM Compact Microphones ...
– are classic condenser microphones that do
not require electronic frequency response
correction
– have a balanced, low-impedance output
– are for universal use
– are small and light
– have an extremely flat frequency response
– their sound is extensively independent of
direction
– have low noise and distortion
– run on both 12 V and 48 V phan tom feed
power supplies
– can be used with very long cables (over
100 meters)
Included accessories:
SGC miniature swivel stand coupler,
polished wood carrying case,
CCM_L: K 5 LU adapter cable (Lemo /
XLR-3M), 5 m long
As with SCHOEPS’ Colette modular micro-
phones, a compact microphone essentially
consists of two main components: an acoustic
transducer (a capsule) and a microphone
amplifier. These only come together in the
same body with Compact Microphones.
The capsule is the component which con-
verts sound waves into a varying electrical
voltage. It determines the directionality and,
for the most part, the sound quality of the
microphone. The amplifier is the other main
component, with the circuitry required to
accept external powering, polarize (charge)
the capacitive capsule, obtain the audio signal
from it, and convert that signal into one which
is balanced and low-impedance.
The circuitry of the Compact Microphones
features a balanced, class-A output stage which
does not use either coupling condensers or
an output transformer. This leads to low out-
put impedance, insensitivity to electrical inter-
ference, low distortion and light weight.
The Compact Microphones have a bass roll-
off filter with a low cut-off frequency of 20Hz
and a slope of 12 dB/oct.
This frequency has been chosen to protect
against perturbing, inaudible (infra-) sound
that can be caused by ventilation systems,
track vehicles and wind. What is tricky about
this is that although it is hardly noticeable,
infrasound can cause strong audible distor-
tions in the connected equipment when it
leads to an overload. This would make it
impossible to produce a recording that could
be used. The audio range also only starts at
around 20Hz. Lower frequencies are only
actually discernible at high levels which are
only reproducible on few audio systems, and
then quickly become unpleasant.
Start up
The U-version of the CCM Compact Micro -
phone has a permanently attached cable that
terminates to a standard XLR-3M connector.
These microphones can be connected directly
to the corresponding microphone inputs.
To connect the L version (L= Lemo), the sup-
plied K 5 LU cable plugs into the CCM Lemo
socket. The K 5 LU cable is terminated
with a standard XLR-3M connector. Put the
cable’s Lemo plug into the microphone port.
Secure it so that the plug is not inadvertently
pulled out or does not rattle while in use by
simply screwing the plug’s lock nut onto the
microphone until it can go no further.
Please note that in order to protect the con-
tacts you should avoid holding the lock nut
and turning the microphone.
SGC
