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230 V~/50 Hz
5
6
FUSE
2-Channel Amplifier
These instructions are intended for users
without any specific technical knowledge .
Please read the instructions carefully prior to
operation and keep them for later reference .
1 Operating Elements and
Connections
1 Power LED ON
2 Volume controls, one each for the left and
right channels
3 Overload LEDs CLIP, one each for the left
and right channels
4 POWER switch
5 Mains jack for connection to a socket
(230 V/ 50 Hz) via the mains cable pro-
vided
6 Support for the mains fuse
Always replace a blown fuse by one of the
same type .
7 Clamping screw for ground connection,
if required
8 Connector panel INPUT to connect a ste-
reo audio source with line signal level (e . g .
mixer) via RCA jacks or XLR jacks (bal .)
9 Connector panel OUTPUT to connect the
speakers via terminals or (Speak on
patible) speaker jacks – refer to chapter 5 .2
6
L-CH
CLIP
0
10
7
GND
2 Applications
This stereo PA amplifier is designed for PA
applications at events, e . g . performance
on stage . It is suitable for installation into a
rack .
The amplifier is protected against short
circuit and overheating . Furthermore, the
absence of a fan allows for silent operation .
3 Safety Notes
This unit corresponds to all relevant directives
of the EU and is therefore marked with
WARNING This 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 .
•
The unit is suitable for indoor use only . Pro-
tect it against dripping water and splash
water, high air humidity and heat (admissi-
ble ambient temperature range: 0 – 40 °C) .
•
Do not place any vessel filled with liquid on
the unit, e . g . a drinking glass .
•
The heat generated inside the unit must be
dissipated by air circulation; never cover the
air vents of the housing .
com-
®
•
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 unit must be repaired by
skilled personnel .
•
Never pull the mains cable to disconnect
the mains plug from the socket, always
seize the plug .
•
For cleaning only use a dry, soft cloth; never
use water or chemicals .
1
R-CH
ON
CLIP
0
10
2
3
8
INPUT
RIGHT
LEFT
LEFT
RIGHT
LEFT
RIGHT
.
STA-125
4
POWER
9
OUTPUT
RIGHT
LEFT
•
No guarantee claims for the unit and no
liability for any resulting personal damage
or material damage will be accepted if the
unit is used for other purposes than orig-
inally intended, if it is not correctly con-
nected or operated, or if it is not repaired
in an expert way .
If the unit is to be put out of oper-
ation definitively, take it to a local
recycling plant for a disposal which
is not harmful to the environment .
4 Setting Up
The amplifier can be set up on its own or
installed in a rack for units with a width of
482 mm (19") . To ensure sufficient cooling,
air must always be able to flow freely through
all air vents .
4.1 Installation into a rack
Screw the two mounting brackets provided
to the sides of the unit . In the rack, the am-
plifier requires a height of 2 RS (1 RS = rack
space = 44 .45 mm) . To prevent the rack from
becoming top-heavy, insert the amplifier into
the lower section of the rack . The mounting
brackets alone are not sufficient for fixing it
safely; additionally use lateral rails or a bottom
plate to secure the unit .
The hot air given off by the amplifier must
be dissipated from the rack; otherwise, heat
will accumulate in the rack which may not
only damage the amplifier but also other units
in the rack . In case of insufficient heat dissi-
pation, install a ventilation unit into the rack .
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