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3. IMPORTANT INSTALLATION INFORMATION
· This appliance may only be connected to a 12 volt system with negative ground.
· The heat radiated when the amplifier is used means that sufficient air circulation is required at the place
of installation. It is very important that the cooler’s cooler ribs do not contact any metal plating or any
surfaces which could impair air circulation. The amplifier may not be installed in small confined spaces or
spaces without air circulation (e.g. spare wheel recess or under the vehicle carpeting). Installation in the
boot is recommended.
· Install the amplifier in such a way that it is protected as far as possible against vibrations and dust and dirt.
· Make sure that the input/output cables are sufficiently distant from the power supply cables as otherwise
interference may occur.
· Make sure that the fuse and operating elements are accessible after installation.
· The appliance’s reliability and performance depend on the quality of installation. Preferably get an expert
to install the system, particularly if you want to install several loudspeakers or a complex multi-way system.
4. CONNECTIONS
4.1 POWER SUPPLY AND AUTOMATIC SWITCHING ON
Important notice: Before commencing the installation, disconnect the plus terminals from the car
battery in order to prevent short circuits.
The power cabling usually installed in on-board car networks is not sufficient for a power amplifier’s demands.
Make sure that the power lines to GND and to the +12 V terminal have been sufficiently specified. Acable cross-
section of at least 10 mm² must be used to connect the battery to the amplifiers terminals.
First connect the amplifiers GND terminal to the battery’s minus pole. It is very important that the connection
is good. Dirt residues must be carefully removed from the battery’s connection point. A loose connection may
cause malfunctions or interference noise or distortion.
The +12 V amplifier connection must then be connected with a power cable possessing an integrated fuse to
the battery’s plus pole. The fuse must be located close to the battery, the length of cable from the battery’s
positive pole to the fuse must be less than 60 centimetres for safety reasons. Only insert the fuse when all
installation work, including the connection of the loudspeakers, has been completed.
Now connect the car hi-fi receivers remote control connection to the amplifiers REM control jack. A cable with
a cross-section of 0.75 mm² is sufficient for connecting the amplifier’s REMOTE connection and the control
device.
4.2 AUDIO CABLES
When installing the audio cable between the cinch output of your car receiver and the cinch input of the amplifier
inside your car, the audio and power supply cables should, wherever possible, not be routed along the same
side of the vehicle. We recommend an isolated installation, e.g. routing the power cable through the cable duct
on the left-hand side and the audio cable through the cable duct on the right-hand side or vice versa. This
reduces interference due to crosstalk into the audio cables.
4.3 LOUDSPEAKER CONNECTIONS
· In normal operating mode (i.e. one loudspeaker on each individual amplifier channel), the lowest terminal
resistance is 2 ohm per channel.
· In bridging mode (two amplifier outputs combined) the lowest terminal resistance doubles to 4 ohm.
· The impedance in tri-mode may not fall below 2 ohm per channel.
· Never connect the loudspeakers’ minus terminals to the vehicle chassis.
· Never connect the +12 V supply voltage to a loudspeaker output as this would destroy the amplifier final
stage.
If the amplifier is operated with lower terminal resistances or incorrectly used as described above, both
the amplifier and the loudspeakers may be damaged. The warranty becomes void in such cases.
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