CS 1
Conference System
Description
The AKG Model CS 1 is an extremely flexible and
sophisticated gating-type conference system for
accommodating large numbers of participants. Its various
modes of operation provide for flexibility and discussion
continuity during the most complex formal and political
meetings.
A single CS BU 1 base unit will handle 100 user
microphone units in four series-wired groups of 25 units
each. One or more Model CS EU 1 extension units may be
used, each providing an additional capability of 100 user
microphone units. The base unit offers the following control
functions:
1. Input level controls: active microphones, line, and
auxiliary. The line input can accommodate additional signal
inputs, such as wireless microphones; the auxiliary input
accommodates an external stereo audio source.
2. NOM (number of microphones) setting; determines the
maximum number of microphones that may be open at one
time; useful in maintaining orderly discussions. Up to five
simultaneous microphones inputs may be on at a given time.
3. Loudspeaker level control. Sets level of output signal
which is fed back to the nearfield loudspeakers located in
each individual user station.
VOICE
ACTIVATED
3
POWER
ON
LIMIT
4. Line output control. Sets level sent to local sound
reinforcement facilities.
O
MICROPHONES
LINE
AUX.
AUDIO
CONTROL
POWER
5. Recording output. Determines the level of the stereo
output signal intended for recording program proceedings.
The CS DU “delegate” user station provides management
via self-contained DIP-switches over the following functions:
1. Microphone sensitivity adjustment (high or low)
2. Automatic muting after long pauses (on or off)
3. Muting time setting (long or short)
4. NOM, on or off (allows distinguished participants to
speak, even when NOM limit has been reached)
5. Voice/pushbutton activation (allows distinguished
participants to speak without using pushbutton); when a user
station is activated, its internal loudspeaker is muted in order
to avoid feedback.
DELEGATE MICROPHONES
LINE OUT
bal.
OUT
/
REC
AUX
L
LINE
IN
bal.
INT.
FINE
IN
OV OV OV
L
SPEAKER
LINE
1
LINE
2
LINE
3
LINE4
ADJUST
R
R
AC POWER INPUT
50/60Hz 250VA
Made in Germany
Features
• Multiple levels of priority gating
• Simplified series-wiring for easy
setup and minimum clutter
The CS CU “chairman” user station is designated for
chairman and sub-chairmen use and has an additional
priority control that will mute all lower priority stations when
engaged. Through the use of dual-level priority action, both
chairman and sub-chairmen levels of control may be
accommodated. This is considered a valuable feature in
political discussions, where there may be multiple levels of
authority on the discussion floor.
• Near-field loudspeaker included in
all user modules
• Base control unit provides for 100
microphone inputs; expansion units
each provide 100 additional inputs
On all user stations a bright red LED ring just below the
microphone capsule lights up when that microphone is
actuated.
Figure 1 shows a typical setup using a single base unit,
and Figure 2 shows as typical setup using a single base unit
plus an expansion unit.
• Uses AKG’s small format high
performance CK-series microphone
capsules mounted on short double
gooseneck extensions
• Base control unit inputs: additional
(wireless) microphones and stereo
program source
• Base control unit outputs: stereo
recording and public address feeds
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Architects and Engineers Specifications
The conference system shall provide a maximum of 400 user
microphone stations, each with its own nearfield loudspeaker
which mutes when that microphone is actuated. Each station shall
provide the following functions: microphone sensitivity adjustment,
The base control unit shall have inputs for external line level
stereo program as well as for additional microphone sources. The
base control unit shall have line level outputs for stereo recording
and for direct feed to local public address facilities. The base unit
switchable pushbutton or voice-actuated operation, and adjustable shall have an effective signal-to-noise ratio no less than 70 dB
muting time in the voice-actuated mode. There shall be a separate
microphone station intended for chairman and sub-chairmen use
which contains, in addition to the foregoing functions, a priority
switch which mutes all stations of lower priority. There shall be at
least four levels of priority selection.
under all operating conditions. System distortion shall be no
greater than 0.1% THD under normal operating conditions. The
conference system shall be the AKG Acoustics Model CS 1.
Graphical Data
or consequential damages. However, the limitation of any right or remedy shall not be effective
where such is prohibited or restricted by law. Simply take or ship your AKG product prepaid to our
service department. Be sure to include your sales slip as proof of purchase date. (We will not repair
transit damage under the no-charge terms of this warranty.) Note: No other warranty, written or oral
is authorized by AKG Acoustics, Inc. This warranty gives you specific legal rights, and you may also
have other rights which vary from state to state. Some states do not allow the exclusion or
limitation of incidental or consequential damages or limitation on how long an implied warranty
lasts, so the above exclusions and limitation may not apply to you.
Limited Warranty
Valid only in the United States. AKG Acoustics warrants AKG products against defects in material
or workmanship for a period of two years from the date of original purchase for use, and agrees to
repair or, at our option, replace any defective unit without charge for either parts or labor. Important:
This warranty does not cover damage resulting from accident, misuse or abuse, lack of reasonable
care, the affixing of any attachment not provided with the product, loss of parts or connecting the
product to any but the specified receptacles. This warranty is void unless service or repairs are
performed by an authorized service center. No responsibility is assumed for any special, incidental
Microphones · Headphones · Wireless Microphones · Wireless Headphones · Headsets · Electroacoustical Components
AKG Acoustics GmbH
Lemböckgasse 21–25, P.O.B. 158, A-1230
Vienna/AUSTRIA
Tel: (43 1) 86 654-0*, Fax: (43 1) 86 654-516
AKG ACOUSTICS, U.S.
914 Airpark Center Drive
Nashville, TN 37217, U.S.A.
Tel: (615) 620-3800, Fax: (615) 620-3875
Studer Japan Ltd.
AKG Acoustics; A Division of Harman Pro Germany
Bodenseestraße 228, D-81243 München/GERMANY
Tel: (089) 87 16-0, Fax: (089) 87 16-200
2-43-7, Uehara, Shibuya-ku, Tokyo 151-0064/JAPAN
Tel: (813) 3465-2211, Fax: (813) 3465-2214
Erikson Pro Audio
Arbiter Pro Audio
Wilberforce Road, London NW9 6AX/ENGLAND
Tel: (0181) 202 1199, Fax: (0181) 202 7076
620 McCaffrey, St-Laurent, Quebec, H4T 1N1, CANADA
Tel: (514) 738-3000, Fax: (514) 737-5069
Specifications subject to change without notice.
DS-CS 1
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