IMG STAGELINE STA-2200 Manual De Instrucciones página 6

PA Stereo Amplifier
These instructions are intended for users without
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
operation and keep them for later reference .
All operating elements and connections
described can be found on page 2 .
1 Overview
1.1 Front panel
1 Volume control for the left channel L-CH
2 Status LEDs for the left channel:
PROTECT lights up with activated protec-
tive circuit (the connection to the speakers
is separated):
1 . after switching-on for a short time
2 . in case of overload/overheating (e . g . also
by short circuit at the output)
3 . in case of DC voltage at the output
LIMITER lights up when the input signal is
too high and limited by the limiter
ACTIVE lights up as a power indication
−25 dB, −20 dB, −15 dB show the input level
3 LC display for operating mode and temper-
atures
4 Status LEDs for the right channel (
5 Volume control for the right channel R-CH
6 POWER switch
1.2 Rear panel
7 Balanced inputs: XLR jacks for the left chan-
nel (L-CH) and the right channel (R-CH)
8 XLR feed-through outputs to pass on the
input signals e . g . to an additional amplifier
9 DIP switches for selecting the operating
mode and for separating signal ground and
housing ground:
operating mode STEREO
operating mode PARALLEL
operating mode BRIDGE
signal ground connected to
housing ground
signal ground and
housing ground separated
(groundlift)
10 Switch FILTER with three positions
SUBWOOFER: low pass filter
with −6 dB at 120 Hz
SATELLITE: high pass filter
with −6 dB at 120 Hz
FULLRANGE: no filter
11 Speaker output: Speakon jack, depending on
plug configuration for the left channel, the
right channel, or for bridge mode
12 Speaker output: Speakon jack for the right
channel
13 Speaker outputs: screw terminals
14 PowerCon mains jack for connection to a
socket (230 V/ 50 Hz)
Important: The PowerCon plug-in connec-
tion must not be connected or disconnected
when carrying any voltage or load . (Switch
off the device beforehand!)
6
15 Protective switch to protect the device; to
reset the released switch, press down the
button
2 Safety Notes
The device corresponds to all relevant directives
of the EU and is therefore marked with
The device corresponds to the relevant UK legis-
lation and is therefore marked with UKCA .
WARNING The device is supplied with haz-
ardous mains voltage . Leave ser-
vicing to skilled personnel only
and do not insert anything into
the air vents! Inexpert handling
may result in electric shock! .
There is a hazard of contact at the speaker
connections with a dangerous voltage during
operation . All connections must only be made
or changed with the device switched off .
•
The device is suitable for indoor use only .
Protect it against dripping water and splash
water, high air humidity, and heat (admissible
ambient temperature range 0 – 40 °C) .
•
Do not place any vessels filled with liquid, e . g .
drinking glasses, on the device .
•
The heat being generated in the device must be
dissipated off by air circulation . Therefore, the
air vents at the housing must not be covered .
item 2)
☞
•
Do not set the device into operation, and im-
mediately disconnect the mains plug from the
mains socket if
1 . there is visible damage to the device or to
the mains cable,
2 . a defect might have occurred after a drop
or similar accident,
3 . malfunctions occur .
The device must in any case be repaired by
skilled personnel .
•
Never pull the mains cable to disconnect the
mains plug from the mains socket, always seize
the plug .
•
For cleaning only use a dry, soft cloth, never
use chemicals or water .
•
No guarantee claims for the device and no
liability for any resulting personal damage or
material damage will be accepted if the de-
vice is used for other purposes than originally
intended, if it is not correctly connected or op-
erated, or if it is not repaired in an expert way .
If the device is to be put out of opera-
tion definitively, dispose of the device
in accordance with local regulations .
3 Applications
This PA stereo amplifier has especially been de-
signed for stage and disco applications . The am-
plifier may be operated in stereo mode, in mono
parallel mode, or in mono bridge mode . With its
class H output circuit, it operates more efficiently
than standard amplifiers of class AB technology .
Due to a switchable filter, the amplifier may
also be used only for subwoofers or only for the
frequency range exceeding 120 Hz . Extensive
protective circuits protect the amplifier and the
speakers connected . Two powerful, tempera-
ture-controlled fans supply the necessary cooling
of the amplifier .
4 Setting-Up
The amplifier is provided for installation into a
rack (482 mm / 19"), but it may also be used as
a table top device . In each case, air must be al-
lowed to flow freely through all air vents so that
a sufficient cooling is ensured .
4.1 Rack installation
For rack mounting, 2 U (rack units) = 89 mm are
required . The hot air given off by the amplifier
at the rear must be able to dissipate from the
.
rack, otherwise heat will accumulate in the rack
which may not only damage the amplifier but
also other devices in the rack . In case the heat is
not dissipated sufficiently, a fan unit has to be
inserted into the rack .
To prevent top-heaviness of the rack, the
amplifier must be inserted in the lower part of
the rack . To ensure a safe fixing, the front panel
alone is not sufficient . In addition, the device
must be fastened at the rear side or be supported
by means of lateral rails or a bottom plate .
5 Connecting the Amplifier
All connections must only be made or changed
with the device switched off!
5.1 Inputs
Connect the output of a preamplifier or mixer to
the XLR jacks INPUTS (7) .
– The jacks are designed for balanced signals;
the pin configuration is shown in fig . 2 . For
connection of sources with unbalanced signals,
use an adapter with the XLR contacts 1 and 3
bridged (e . g . the adapter MCA-15 / 2: 2-pole
6 .3 mm inline jack to XLR plug) .
– The input signal should have line level . For rated
power of the amplifier, an input signal of 1 V is
required as a minimum .
– For bridge mode or parallel mode, only connect
the input of the left channel L-CH .
– Via the feed-through outputs (8) which are
directly connected to the respective input
jack (7), the signal can be fed e . g . to an addi-
tional amplifier .
5.2 Speakers
The maximum output power is reached in stereo
mode and in parallel mode when connecting 4 Ω
speakers (minimum admissible load impedance) .
It is also possible to connect 8 Ω speakers, how-
ever, in this case the output power will slightly
decrease . In bridge mode, the maximum out-
put power will be reached with an 8 Ω speaker
(minimum admissible load impedance in bridge
mode) . The required power rating (P
speakers is listed in the table fig . 3 .
Important: The total impedance at each out-
put must not fall below 4 Ω in stereo mode and
parallel mode and must not fall below 8 Ω in
bridge mode!
As long as, in the stereo mode or parallel
mode, the RMS output power does not exceed
750 W per channel, operation with 2 Ω loads is
also supported . Operation in the bridge mode
at a 4 Ω load is possible for an RMS output
power of up to 1500 W .
Connect the speakers to the Speakon jacks (11,
12), pin configuration of the plug see fig . 2, or
to the screw terminals (13) . When connecting
the speakers, make sure that all speakers have
the same polarity .
After connecting a Speakon plug to the jack,
turn it clockwise until it locks . For removing it
later, retract the lock latch at the plug and turn
the plug counter-clockwise .
If the screw terminals are used, ensure that
the cable ends are not stripped too far and that
no bare wires protrude (hazard of contact and
short circuit) .
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