Safety Notes; Applications; Installation Into A Rack; Connecting The Amplifier - IMG STAGELINE STA-1000D Mode D'emploi

Digital stereo PA amplifier
These instructions are intended for users with-
out any specific technical knowledge . The
speakers, however, should only be connected
by persons with the corresponding technical
knowledge . Please read these instructions
carefully prior to operating the unit and keep
them for later reference .
All operating elements and connections
de scribed can be found on the fold-out
page 3 .
1 Operating Elements and
Connections
1 LED indicators, one for each amplifier
channel
CLIP = overload indication
SIGNAL = signal indication
2 Volume controls, one for each amplifier
channel
3 LED indicators
ON lights up when the amplifier is
switched on
PROTECT briefly lights up after switching
on and in case of malfunction
(short circuit, overload or DC
voltage at a speaker terminal)
OVERHEAT lights up to indicate overheat-
ing of the amplifier
BRIDGE lights up to indicate activation
of the bridge mode
4 POWER switch
5 Mains jack for connection to a socket
(230 V/ 50 Hz) via the mains cable provided
6 Support(s) for the mains fuse(s)
Always replace a blown fuse by one of
the same type .
7 Signal inputs via RCA jacks
8 Signal inputs via XLR jacks (bal .)
9 SPEAKON jacks to connect speakers for
the bridge mode
10 Selector switch OPERATING MODE*
In the position BRIDGE, two amplifier
channels are interconnected for the bridge
mode . In the position STEREO or NORMAL,
the amplifier channels operate separately .
11 Switch BRIDGE MODE* for the bridge
mode, to adjust the speaker impedance
Important! For the stereo / single-channel
mode, always set the switch to the
position "8 Ω" .
12 SPEAKON jacks to connect the speakers
STA-1000D: for the stereo mode
STA-2000D: for the single-channel mode
* Notes:
Only use the switches when the amplifier has been
switched off!
On model STA-2000D, these switches are available
for the channel pairs 1/ 2 and 3 /4 .
6

2 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 .
•
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 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 .
•
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 origi-
nally intended, if it is not correctly connected
or operated, or if it is not repaired in an
expert way .
If the unit is to be put out of operation
definitively, take it to a local recycling
plant for a disposal which is not harm-
ful to the environment .

3 Applications

This digital PA amplifier (class D) is specially
designed for applications on stage, in clubs
and in 100 V PA systems . Model STA-1000D
is equipped with two amplifier channels (2 ×
500 W/4 Ω); model STA-2000D is equipped
with four amplifier channels (4 × 50 W/4 Ω) .
The channels can be interconnected in pairs
for the bridge mode to increase the output
voltage and the output power . At full load,
the output voltage will be 100 V .
To ensure sufficient cooling, the ampli-
fier is equipped with temperature-controlled
and silent fans . Due to its design as a class D
amplifier and a switch-mode power supply,
the amplifier offers high efficiency, compact
size and small weight . Extensive protective cir-
cuits will protect the amplifier and the speakers
connected .
4 Setting Up
The amplifier is designed for installation into a
.
rack (482 mm / 19"), but it can also be placed
on a table . To ensure sufficient cooling, air
must always be able to flow freely through
all air vents .

4.1 Installation into a rack

For installation into a rack, the amplifier re-
quires a height of 2 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 front panel alone is 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 dissipa-
tion, install a ventilation unit into the rack .

5 Connecting the Amplifier

Prior to making or changing any connections,
switch off the amplifier and the units to be
connected .
1) Feed the input signals for the amplifier to
the XLR jacks (8) or to the RCA jacks (7):
At these jacks, connect, for example, the
output of a preamplifer or of a mixer . The
balanced XLR jacks should be preferred,
especially with long connection cables, be-
cause a balanced signal transmission will
provide the best interference suppression .
The input signal should have line level .
For the bridge mode: On model
STA-1000D, only connect the jack L
or L-CH of the left channel; on model
STA-2000D, only connect the jacks CH 1
and CH 3 . The signals at the other jacks will
be ignored in the bridge mode .
2) Connect the speakers to the SPEAKON
jacks:
Model STA-1000D: For the stereo mode,
use the jacks R-CH and L-CH (12); for the
bridge mode, use the jack BRIDGE (9) .
Model STA-2000D: For the single-channel
mode, use the jacks CH 1 to CH 4 (12); for
the bridge mode, use the jacks BRIDGE (9) .
The pin configuration of the plugs can be
found in chapter 8 .1 . After inserting a plug
into the jack, turn the plug clockwise until
it engages . To remove the plug, pull back
the latch on the plug and turn the plug
counter-clockwise .
Different possibilities for connecting multi-
ple speakers to one channel can be found
in fig . 5 on page 3 which also shows the re-
quired power rating (P
at the corresponding impedance (Z) . When
interconnecting multiple speakers, always
observe the correct positive and negative
connections and make sure that the total
impedance is at least 4 Ω .
) of each speaker
min