9
English
2 Safety Notes
The unit corresponds to all relevant directives
of the EU and is therefore marked with .
WARNING
The unit uses dangerous
mains voltage . Leave servicing
to skilled personnel only and
do not insert anything into the
air vents . Inexpert handling may result in
electric shock .
During operation, there is a hazard of con
tact at the connections OUTPUT 70 V and
100 V (21) with a volt age of up to 100 V .
Always switch off the PA system before
making or changing any connections .
•
The unit is suitable for indoor use only . Pro
tect it against dripping water and splash
water, high air humidity and heat (admis
sible ambient temperature range 0 – 40 °C) .
•
Do not place any vessels filled with liquid,
e . g . drinking glasses, on the unit .
•
The heat produced inside the unit must be
carried off by air circulation; never cover
the air vents (22) of the housing .
•
Do not operate the unit or immediately
disconnect the mains plug from the socket
1 . if the unit or the mains cable is visibly
damaged,
2 . if a defect might have occurred after the
unit was dropped or suffered a similar
accident,
3 . if malfunctions occur .
In any case, the units must be repaired by
skilled personnel .
•
Never pull the mains cable to disconnect
the mains plug from the mains socket, al
ways seize the plug .
•
For cleaning only use a dry, soft cloth, never
use chemicals or water .
•
No guarantee claims for the unit and no li
ability for any resulting personal damage or
material da m age will be accepted if the unit
is used for other purposes than originally
intended, if it is not correctly connected,
operated or not repaired in an expert way .
If the unit is to be put out of oper
ation de finitively, take it to a local
recycling plant for a disposal which
is not harmful to the environment .
3 Applications
The amplifier has especially been de signed for
setting up a PA system for general PA appli
cations . The different speaker outputs allow
to connect various speaker combinations (see
fig . 3) . The speakers can be distributed to
four PA zones, and the volume of each zone
can be adjusted independently of the others .
It is possible to connect microphones
(CH 1 – 3) or units with line level output
(CH 1 – 5) to the five inputs which can be
mixed with each other . All inputs can be as
signed to the four PA zones independently
of each other . An additional line level input
is provid ed for emergency announcements
or other important announcements . With a
separate switch it is possible to switch to this
input .
For monitoring the zone signals, outputs
for headphones and an 8 Ω monitor speaker
are provid ed . The zone signals may individu
ally be fed via the outputs LINE OUT (20) or
mixed via the output MIX OUT (15) to further
amplifiers or to a recorder .
4 Setting up the Amplifier
The amplifier is provided for installation into a
rack for units with a width of 482 mm (19”),
but it can also be used as a table top unit .
In any case, make sure that air will circulate
freely through all vents to provide sufficient
cooling of the unit .
4.1 Rack installation
Prior to installing the amplifier into a rack,
give priority to the inputs CH 1 and TEL
PAGING, if required . Open the amplifier for
this purpose (chapter 6 .1) .
For rack mounting 3 RS (3 rack spaces =
133 mm) are required . To prevent the rack
from becoming topheavy, the amplifier must
be inserted in the lower section of the rack .
The front panel alone is not sufficient for
fixing it safely . In addition, lateral rails or a
bottom plate must secure the unit .
The air heated by the amplifier must be
able to leave the rack; otherwise, this will
result in heat accumulation within the rack
which may not only damage the amplifier
but also other units in the rack . In case of in
sufficient heat dissipation, install a ventilation
unit into the rack .
5 Connecting the Amplifier
All connections should only be made by spe
cialized personnel and always with the am
plifier switched off!
5.1 Speakers
Fig . 3 on page 3 shows examples of different
possibilities of connection of the speakers for
each PA zone .
Caution!
For each zone, connect low im
pedance speakers only (4 Ω, 8 Ω) or PA
speakers only (25 V, 70 V, 100 V); otherwise,
the amplifier will be damaged .
However, it is possible to connect low im pe
dance speakers and PA speakers in different
zones .
When connecting PA speakers, make sure
that the RMS power at each of the four zone
outputs will not exceed
40 W
(PA4040) or
120 W
(PA12040) . When interconnecting
low impedance speakers, make sure that the
impedance will not fall below the value stated
at the terminal (4 Ω or 8 Ω) .
Connect the speakers to the terminal
strips OUTPUT (21): the negative connections
to the terminal “COM” and the positive con
nections to the corresponding terminal “4 Ω”,
“8 Ω”, “25 V”, “70 V”, or “100 V” .
5.2 Monitor speaker and headphones
To be able to monitor the signals of the PA
zones, it is possible to connect an 8 Ω speaker
to the terminals MONITOR (16) and head
phones to the jack PHONES (10) .
5.3 Microphones
Up to three microphones with XLR plug or
6 .3 mm plug may be connected to the in
puts CH 1 to CH 3 (29) . Set the input level
switches (19) to the corresponding position .
Only actuate the switches when the amplifier
is switched off or when the corresponding
control LEVEL (6) is set to zero (switching
noise) .
MIC
for microphones which do not require
phantom power
PHANTOM
for phantompowered micro
phones
Caution!
Do not connect any microphones
with unbalanced output when the phan
tom power has been activated . These mi
crophones may be damaged .
5.4 Units with line output
Up to five units with a line output (e . g . CD
player, cassette recorder, radio) may be con
nected to the inputs CH 1 to CH 5 (27 and
29) . For background music, it is best to use
the inputs CH 4 and CH 5 . These inputs may
be muted with a separate switch when e . g .
an announcement is made via the input CH 1
(see chapter 5 .6) . The stereo signals fed to
the jacks “L” and “R” of the inputs CH 4 and
CH 5 are internally mixed to a mono signal .
When connecting to the inputs CH 1 to
CH 3, set the corresponding input level switch
(19) to the position LINE . Only actuate the
switch with the amplifier switched off (switch
ing noise) . For connecting a stereo unit to
the inputs CH 1 to CH 3, use one input each
for the right stereo channel and the left ste
reo channel or use a stereo mono adapter
(e . g . SMC1 from MONACOR); otherwise,
the signals of the stereo centre will cancel
each other out .
