Power Supply; Ground Connection; Operating Voltage - Monacor Carpower D-REX/2000 Manual De Instrucciones

All operating elements and connections de -
GB
scribed can be found on the fold-out page 3.
1 Operating Elements
and Connections
1 RCA jacks LINE INPUT for the input signals
(line level)
2 RCA jacks LINE OUTPUT for connection of the
inputs of a second amplifier
At these jacks the input signal of the jacks
LINE INPUT is present.
3 Trimming control GAIN for matching the input
level
4 Trimming control PHASE for adjusting the
phase 0 – 180° ( chapter 7)
5 Trimming control BASS EQ for bass boosting
(0 – 18 dB at 45 Hz)
6 Jack REMOTE for the cable remote control (14)
7 Trimming control SUBSONIC for adjusting the
cut-off frequency of the subsonic filter which
suppresses the infrasound
8 Trimming control LOW PASS for adjusting the
cut-off frequency of the low pass (the fre-
quency at which the radiating range of the sub-
woofer is to end)
9 Switch MODE for the operating mode
Set it to position MASTER OUTPUT; only when
the power amplifier is connected as a slave unit
in the master slave mode, set the switch to
position INPUT SLAVE (
10 LED PWR / PROT
Green = normal operation
Red = the protective circuit has switched off
the power amplifier (in case of over-
heating or when a defect has occurred)
11 Jack SLAVE INPUT for the master slave mode
( chapter 6.5)
12 Jack MASTER OUTPUT for the master slave
mode ( chapter 6.5)
13 End covers: To fasten the power amplifier with
screws, remove the end covers upwards, then
the mounting brackets are accessible.
14 Remote control for readjusting the volume of
the subwoofer
15 Connection +12 V for the operating voltage
16 Control input REM to switch on the power
amplifier via a 12 V voltage
17 Ground connection GND
18 Speaker terminals SPEAKER OUTPUT
2 Safety Notes
The power amplifier corresponds to all relevant
directives of the EU and is therefore marked
with .
WARNING When connecting the car hi-fi
power amplifier to the car battery,
be especially careful. In case of
short circuits there may be danger-
ously high currents. Therefore,
prior to the connection, it is indis-
pensable to screw off the negative
terminal of the car battery.
The power amplifier must be mounted to a
mechanically stable place in the car. It must be
skilfully fixed so that it does not get loose and
turn into a dangerous projectile.
During operation the unit may become very hot.
Therefore, do not place any objects sensitive to
heat near it and do not touch the power amplifier
while in operation.
6
G
CAUTION Do not seize the car hi-fi power
amplifier by the plastic end covers (13). The
power amplifier will slide out of the covers. You
may be injured and the power amplifier may be
damaged.
Always seize the metal housing to carry the
power amplifier!
G
For cleaning only use a dry, soft cloth, never
use chemicals or water.
G
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 originally intended, if it is
not correctly mounted or operated, or not re -
paired in an expert way.
chapter 6.5)
3 Caution in Case
of High Volumes
CAUTION Never adjust the volume very high.
after some time. Therefore, do not increase a
high volume which has once been adjusted after
getting used to it.
While driving in the car, signal sounds, e. g. by an
ambulance, must not be drowned by the volume
of the car hi-fi system which has been adjusted
too high.
With the engine switched off, the car hi-fi system
should not be in operation at a high volume for a
longer period of time. The car battery will quickly
be discharged, and then it may not be capable any
more of supplying sufficient energy for starting the
car.
4 Applications
The car hi-fi power amplifier D-REX / 2000 has
especially been designed for the operation of a
subwoofer of high power capability in a car hi-fi sys-
tem (e. g. the RAPTOR series from CARPOWER).
The power amplifier operates as a class D ampli-
fier. Thus, a high efficiency at a minimum of
heating-up is achieved. The rms output power is
2200 W as a maximum when using a 1 Ω sub-
woofer.
The power amplifier is equipped with an
adjustable low pass filter so that no further filters
are required for the operation. As a protection of
the subwoofer against frequencies below the
range of audibility (infrasound) an adjustable sub-
sonic filter is integrated.
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.
Extremely high volumes may dam-
age your hearing. Your ear gets
accustomed to high volumes which
do not seem to be so high any more
5 Mounting
When choosing the place of mounting, always
observe the following items in any case:
G
The 12 V power supply cable from the battery to
the car hi-fi power amplifier should be as short
as possible. It is better to use longer speaker
cables and a shorter power supply cable
instead.
G
The ground cable from the power amplifier to
the chassis of the car should also be as short as
possible.
G
For carrying off the heat being generated in the
car hi-fi power amplifier, a sufficient ventilation
has to be ensured.
G
As forces occur during braking, the power
amplifier must tightly be screwed to a mechani-
cally stable place.
Remove the two plastic covers (13) at the front
sides of the power amplifier upwards. The four
mounting brackets are accessible now. Tightly
screw the power amplifier with the brackets at a
suitable place. Replace the covers.
6 Connection of the
Power Amplifier
G
The connection of the car hi-fi power amplifier
to the electric system of the car must only be
carried out by skilled personnel.
G
To prevent damage in case of a possible short
circuit during installation, always screw off the
negative terminal of the car battery prior to the
connection.
G
Lay the necessary cables so that their insula-
tion cannot be damaged.
Different possibilities of connection are shown in
figures 2 and 3 on page 3.

6.1 Power supply

To keep the voltage loss by the power supply
cables as low as possible, cables with a cross sec-
tion of 50 mm 2 should be used. In case of very
short connections, e. g. between power amplifier
and the corresponding separate fuse, it is also
possible to use a smaller cross section.

6.1.1 Ground connection

Connect the ground terminal GND (17) to the
ground of the car or better directly to the negative
terminal of the car battery.
Notes
1. When using the chassis as a ground connection, the
place used must have a good electrical contact to the
main chassis (e. g. by a sufficient number of welding
points). Any lacquer at the point of contact must com-
pletely be removed.
2. To prevent ground loops, the ground of the car radio
must be applied at the place where also the power
amplifier is grounded.

6.1.2 Operating voltage

Connect the terminal +12 V (15) to the positive ter-
minal of the car battery. To protect the newly laid
12 V cable against short circuit, insert an addi-
tional fuse very close to the battery (max. cable
length to the battery 20 cm). Select the fuse value
according to the current consumption of all units
connected to the 12 V cable.
To stabilize the operating voltage for the
power amplifier and thus the resulting power
increase and sound improvement, a power capac-
itor is recommended (e. g. CAP-... from CAR-
POWER).
6.1.3 Control voltage for switching-on
The car hi-fi power amplifier is switched on and off
by a control voltage of +12 V at the terminal REM
(16). Connect the terminal REM to the 12 V control