11
English
4
3
2
1
ON
SELECT
OFF
ON
No.
1
2
3
4
for
input
CH 2
CH 3
CH 1
CH 1 and
TEL INPUT
Position
OFF
Mikrophone
level
phantom
power
OFF
CH 1 has
highest priority
Position
ON
line level
phantom
power
ON*
TEL INPUT has
highest priority
*Important:
When phantom power has been acti-
vated, do not connect any microphone or audio unit
with unbalanced output signal to the input CH1; the
microphone/audio unit may be damaged .
Note:
When announcements are being made via
the channels CH 2 and CH 3, the signals of the music
module and of the inputs CH 4 and CH 5 will be
slightly attenuated .
2) To connect
audio sources
with line level out-
put (e . g . CD player, mixer), use the following
jacks:
– RCA jacks CH 4 and CH 5
– 6 .3 mm jacks CH 2 and CH 3
Note:
The inputs CH4 and CH5 are provided with
a pair of jacks for the connection of audio stereo
sources . The amplifier will create a mono signal from
the stereo signal . To connect stereo audio sources to
the inputs CH 2 and CH 3, use a stereo/mono adapter
(e . g . SMC-1) .
When connecting the audio sources to the
jacks CH 2 and CH 3, set the DIP switches 1
and 2 to the position ON (also see table) .
3) For
important (emergency) announce-
ments
, use the input TEL INPUT . It is possible
to connect, for example, a telephone system
with line level output to this input .
Note:
A signal at the input TEL INPUT will mute all
other channels . When DIP switch 4 is in the position
OFF, however, announcements made via the input
CH 1 will have highest priority and will also mute the
channel TEL INPUT .
4) To insert an
audio unit for signal process-
ing
(e . g . an equalizer or an automatic volume
control), use the RCA jacks AMP IN and PRE
OUT . To do so, remove the jumper from the
jacks, connect the input of the audio unit to
the jack PRE OUT and connect the output to
the jack AMP IN .
Note:
The signal in the amplifier will be interrupted
if only one of the two jacks is connected or if the
unit inserted is not switched on, if it is defective or
not correctly connected . In this case, the speakers
will remain mute .
5) Connect a
DAB / FM antenna
to the jack
ANTENNA . With good reception conditions,
the wire antenna provided can be used .
6) If it is necessary
to mute the speaker out-
puts
, connect the two MUTE terminals, e . g .
via a switch .
3.2 Outputs
1)
Speakers:
Either
connect 100 V or 70 V
speakers to the terminals “100V” or “70V”
and “COM” (page 2, fig . 1) . The load by
the speakers must not exceed the power rat-
ing of the amplifier (chapter 5); otherwise, the
protective circuit will interrupt the connection
to the speaker terminals .
Or
connect a speaker or a speaker group to
the terminals “4 Ω”, “8 Ω” or “16 Ω” and
“COM” . The total impedance of the speakers
must not fall below the value indicated at the
terminal used . Figure 2 on page 2 shows
various ways to observe the minimum imped-
ance . There are, however, also other possi-
bilities .
USE ONLY WITH A 250V FUSE
4
3
2
1
ON
+
+
1
2
3
230V~
50Hz
FUSE
24V
COM 4Ω
8Ω 16Ω 70V 100V
SPEAKER OUTPUT
COM
COM
TEL INPUT
600Ω/100mV
600Ω/1V
MOH OUTPUT
CH
2
CH
3
SELECT
ON
OFF
1
ON - CH
2 LINE
OFF - CH
2 MIC
1
ON - CH
3 LINE
OFF - CH
3 MIC
2
ON - PH. POWER CH
1 ON
OFF - PH. POWER CH
1 OFF
3
ON - PRIO. TEL
OFF - PRIO. CH
1
4
2 3 4
CH
1
ANTENNA
MUTE
CH
4
CH
5
PRE
OUT
AMP IN
