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PA Stereo Amplifier
These instructions are intended for users without
any specific 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 CLIP lights up if the left channel is over-
load ed and in case of short circuit of the left
output
2 Volume control for the left channel
3 LED ON
4 LED PROTECT lights up with activated protective
circuit: approx . 1 second after switching-on until
the speaker outputs are ready for operation and
if the amplifier is overheated
5 Volume control for the right channel
6 LED CLIP lights up with overload of the right
channel and in case of short circuit of the right
output
7 POWER switch
8 Speaker connections OUTPUTS as "Speaker"
jacks
9 Jacks INPUTS as 6 .3 mm jacks for units with line
level (e . g . mixer, preamplifier)
10 Jacks INPUTS as RCA jacks for units with line
level
11 Ground lift switch
position GND: signal ground and housing ground
are connected
position LIFT : signal ground and housing ground
are separated
12 Speaker connections OUTPUTS as 6 .3 mm jacks
13 Speaker connections OUTPUTS as screw termi-
nals with 4 mm banana jacks
14 Fuse holder; only replace a blown fuse by one
of the same type
15 Mains jack for power supply for connection to
230 V/ 50 Hz
2
Safety Notes
This unit corresponds to all relevant directives of
the EU and is therefore marked with
WARNING The unit is supplied with hazard-
ous mains voltage . Never make any
modifications on the unit and do not
insert anything through the air vents!
This may cause an electric shock .
There is a hazard of contact at the speaker connec-
tions (8, 12, 13) with a dangerous voltage during
operation . All connections must only be made or
changed with the unit switched off .
•
The unit is suitable for indoor use only . Protect it
against dripping water, splash water and high air
humidity . The admissible ambient temperature
range is 0 – 40 °C .
•
Do not place any vessel filled with liquid, e . g . a
drinking glass, on the unit .
•
The heat generated in the unit has to be dissi-
pated by air circulation . Therefore, the air vents
of the cabinet must not be covered .
•
Immediately disconnect the mains plug from the
mains socket if
1 . there is visible damage to the unit or to the
mains cable,
2 . a defect might have occurred after a drop or
similar accident,
3 . there are malfunctions .
The unit 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, by no
means chemicals or water .
•
No guarantee claims for the unit and no liability
for any resulting personal damage or material
dam age will be accepted if the unit is used for
purpos es other than originally intended, if it is
not correct ly connected or operated, or not re-
paired 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 harmful
to the environment .
3
Applications
This PA stereo amplifier is especially designed for
the use on stage and in the discothèque . Extensive
protective circuits protect the amplifier and the con-
nected speakers .
4
Installation
The amplifier is designed to be mounted into a rack
(482 mm / 19"), but it may also be used as a table
top unit . In any case air has to move freely through
all air vents so that a sufficient cooling is ensured .
4.1 Rack installation
For the rack mounting 2 rack spaces = 89 mm are
re quired . Additional space should remain above
and below the amplifier in order to ensure sufficient
ventilation .
In order to avoid the rack to become top-heavy,
the amplifier has to be mounted in the lower part
of the rack . The front plate alone is not sufficient as
a secure fastening . The unit has to be additionally
supported by side rails or a bottom carrier plate .
5
Connecting the Amplifier
All connections must only be carried out if the unit
is switched off!
1) Connect the output of a preamplifier or mixer
to the RCA jacks or 6 .3 mm jacks INPUTS (9, 10) .
The input signal should have line level . For rated
.
power of the amplifier an input signal of 1 .3 V
is required as a minimum .
2) The maximum output power is obtained when
connecting 4 Ω speakers . It is also possible to
connect 8 Ω speakers; however, the output
power will slightly decrease in this case . The
speak ers must have a power rating of at least
200 W (4 Ω speakers) or 125 W (8 Ω speakers)
[compare fig . 4] .
Connect the speakers to the "speaker" jacks
(8), 6 .3 mm jacks (12), or to the terminals (13) .
For pin configuration see fig . 3 . When using the
"speaker" jacks (8), the contact pairs 1+ / 1− or
2+ / 2− can be used as in the unit the contact
1+ is connected to 2+ and the contact 1− is
connect ed to 2− . When connecting the speak-
ers, pay attention to the same polarity of all
speakers .
The possibilities of connection for several
speakers to one channel with the respective
power ratings are shown in figs . 5 to 8 . When
interconnecting several speakers, it is especially
important to pay attention to the correct con-
nection of the positive and negative contacts
and to a minimum total impedance of 4 Ω .
3) Finally connect the mains cable to the mains jack
(15) and the mains plug of the cable to a socket
(230 V/ 50 Hz) . Prior to the first switching-on,
turn the controls (2 and 5) to the left stop to 0 .
6
Operation
6.1 Switching on /off
In order to avoid loud switching noise, always
switch on all other units in an amplifier system be-
fore switch ing on the power amplifier, and switch
it off first after operation . After switching-on, the
LED PROTECT (4) lights up for approx . 1 second .
During this time the switch-on delay is activated to
protect the speakers .
6.2 Level adjustment
Set the output of the mixer or preamplifier to its
rated level (0 dB) or to the highest undistorted out-
put signal . Turn up the controls (2 and 5) so far
until the maximum desired volume is reached . If the
red LEDs CLIP (1 and 6) show the overload of the
amplifier, slightly turn back the controls .
CAUTION Never adjust the amplifier to a very
high volume . Permanent high vol-
umes may damage your hearing! The
human ear will get accustomed to
high volumes which do not seem to be that high
after some time . Therefore, do not further increase
a high volume after getting used to it .
6.3 Ground lift switch
If an interfering hum noise can be heard without
a music signal, a ground loop may be the reason
for this . Ground loops may occur if two units have
contact both via the signal ground and via the
earthed conductor of the power supply or a con-
ductive connection of the housings in the rack . To
separate the ground loop thus occurring, set the
ground lift switch (11) to position LIFT .
7
Protective Circuit
The protective circuit is provided to prevent damage
to the speakers and the amplifier . If it is activated,
the yellow PROTECT LED (4) lights up:
1 . approx . 1 second after switching-on (soft start)
2 . if the amplifier is overheated
If a short circuit has occurred at a speaker output,
the CLIP LED (1, 6) of the corresponding channel
lights up . If this is the case or if the yellow LED
PROTECT lights up during the operation or if it is
not extin guished after switching-on, the amplifier
must be switched off and the cause for the defect
has to be eliminated .
8
Specifications
Rated output power
Stereo 4 Ω: 2 × 200 W
Stereo 8 Ω: 2 × 125 W
Peak music
output power (P
): 600 W
max
Input sensitivity for
rated power at 4 Ω: 1 3 V
Input impedance: 55 kΩ
Frequency range: 10 – 20 000 Hz, -0 5 dB
S / N ratio: 64 dB
Channel separation: > 55 dB, 1 kHz
THD: 0 05 %, 5 W at 4 W
Power supply: 230 V/ 50 Hz
Power consumption: max 730 VA
Ambient temperature: 0 – 40 °C
Dimensions, Weight: 482 × 95 × 300 mm, 7 6 kg
Subject to technical modification .
All rights reserved by MONACOR
INTERNATIONAL GmbH &
®
Co. KG. No part of this instruction manual may be reproduced
in any form or by any means for any commercial use.
5
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