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User guide
Compact Series
Contents
page
System overview 2
Compact Microphones 3
Phantom powering 4
EMC, Technical specifications 6
Block diagram 7
Microphone selection 8
Basic microphone characteristics 9
Suggested microphones for specific applications 10
Pressure transducers 11
Pressure-gradient transducers 12
Switchable microphone 16
Microphones for close pickup 17
Acoustic specifications of the microphones 19
Care and maintenance / Troublshooting 20
Warranty / declaration of conformity 22
CCM
Compact Microphones
table stand
TR 200Lg
SCHOEPS GmbH · Spitalstr. 20 · D-76227 Karlsruhe (Durlach) · Tel: +49 (0)721 943 20-0 · Fax: +49 (0)721 943 2050
www.schoeps.de · mailbox@schoeps.de
System Overview – A Selection
2
System Overview
microphone pre-
amplifier or mixer
COMPACT ICROPHONEM
with permanently
attached cable;
special version
adjustable-height
stand
STV 900/1400 L3Ug
Stereo
COMPACT ICROPHONEM
microphone tubes
e.g. RL 700g
gooseneck for
table mounting
SRS 420 L5Ug
Y-cable KLY I
Y-cable KLY SU KS 5IU
adapter cable
to XLR-5M
AK SU/2U
adapter cable
from XLR-5F
to 2× XLR-3M
K 5 LU
adapter cable
(Lemo / XLR-3M)
MDZ
attenuator
table tube
RLG 350 Ug
elastic sus-
pension for
tables
CCM_U
CCM_L
low-cut
filter
LC 60 U
low-pass -
filter
LP 40 U
Mechanical accessories for CCM_L and CCM_U – a selection
. . .
SGCM
STC 4gOSIX CCM LU
BLCg
Accessories
– a selection
SCHOEPS GmbH · Spitalstr. 20 · D-76227 Karlsruhe (Durlach) · Tel: +49 (0)721 943 20-0 · Fax: +49 (0)721 943 2050
www.schoeps.de · mailbox@schoeps.de
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
SCHOEPS GmbH · Spitalstr. 20 · D-76227 Karlsruhe (Durlach) · Tel: +49 (0)721 943 20-0 · Fax: +49 (0)721 943 2050
www.schoeps.de · mailbox@schoeps.de
Phantom Powering
4
Technology
Phantom powering
CCM microphones are electrically active com-
ponents which require operating current. This
will most often be supplied by the inputs of a
mixer, preamplifier or recorder with suitable
microphone powering built in. Otherwise, an
appropriate type of stand-alone microphone
power supply can be used.
Like most modern, solid-state professional
microphones, the CCM also uses a standard-
ized powering scheme known as “phantom
powering.” Most recording equipment offers
a 48-Volt supply for such microphones. Some
equipment, however, provides a 12-Volt sup-
ply for phantom powering, or can readily be
modified for such a supply. The SCHOEPS CCM
compact microphones series can work with
either voltage, switching its circuitry automati-
cally 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.
Please note that the CCM compact micro-
phones are designed to work with standard
12-Volt or standard 48-Volt phantom power-
ing. They are therefore not ”12 - to - 48 Volt”
microphones. Any input to which it is con-
nected must implement one of those two
standard phantom powering methods, which
means that not only must the supply voltage
meet the standard, but the resistors must be
correct as well.
Our microphones are developed and tested
with power supplies that conform to the
require ments of this standard. Proper opera-
tion with non-standard power supplies cannot
be guaranteed. Circuit arrangements that
deviate from the standard can cause opera-
tional problems (i.e. distortion or even gaps in
the signal), particularly at high sound pressure
levels or in the presence of strong wind noise.
Such problems may often seem to defy analysis
until their real cause is discovered.
You can find out more about phantom
power supplies below.
+ phase
- phase
2
3
microphone
1
screen
cable
powering
RS
US
input
RS
P48: US= 48 V ± 4 V; R S= 6,8 k *,WImax.= 10 mA
P12: US= 12V ± 1V; R S= 680 *,WImax.= 15 mA
I/2
I/2
I
+ phase
- phase
2
3
microphone
1
screen
cable
powering
RS
US
input
RS
RR
C
C
*see note in the text concerning tolerances
Fig. 2
balanced, ungrounded,
transformerless input.
Condensers must be
inserted into the circuit
and provision made for
polarization resistors.
*
*
*
Fig. 1
input with transformer
(or balanced, ungrounded
transformerless input)
XLR-3
connector
XLR-3
connector
*recommended values:
C: 100
μ
F, 63V; R: 22k
Ω
, 1%
shield
shield
Produktspecifikationer
| Varumärke: | Schoeps |
| Kategori: | mikrofon |
| Modell: | CCM 2S |
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