Connecting The Power Supply; Connecting The Amplifier - Conrad CRUNCH Fat Boy Notice D'emploi

8. Connecting the power supply

The electric connection should be done by a specialist.
To avoid shorts and any resulting damage to the devices, the negative terminal (earth) of the
car battery has to be disconnected first.
Only connect the negative terminal of the battery, when you have connected the devices
completely and have checked the connection.
You should only use a voltmeter or a diode test lamp for checking the voltage on the on-board
cables as normal test lamps consume excessive currents and can thus damage the electronic
system of the car.
When laying the cables, make sure that they are not squeezed or scoured on sharp edges. Use
rubber spouts for the lead-though points.
In order to reduce disturbing influences of the generator or of other electric installations of the
vehicle, the amplifier should be directly powered by tapping the car battery. No other electrical
consumers such as, for example, the fan, the windscreen washer etc., may be supplied with
current by the same cable as the car amplifier.
Use connecting cables with an as large cross-section as possible for connecting the power
supply and the earth of the amplifier. The necessary cross-section of the cable is aligned to the
output requirement for the connected components (recommendation for sole operation of the
set 16mm² )
A cross-section of the cables which is too small can cause a cable to char through in
unfavourable cases. Moreover, the increased ohmic resistance leads to unnecessary losses of
power.
An additional fuse in the positive connection of the amplifier is absolutely necessary (fuse
holder is not included in the scope of delivery). The fuse should be placed as close as possible
to the battery (max. 20 cm away). In case of a short circuit (e.g. if the connecting cable is worn
through), the fuse will disconnect the positive lead thus avoiding damage to the battery or
preventing the supply cable from burning.
The strength of the fuse depends on the power consumption of the connected devices of the
car hi-fi system.
a) Connecting the amplifier
• Connect the +12V (13) connector to the connection terminal of the power supply directly to the positive terminal
of the car battery.
• Connect the REM (14) connector of the connection terminal of the power supply to the remote control connection
of the aerial control output of the car radio.

The amplifier will be switched on through this input, if a voltage of +12V is applied.
Nowadays, almost all car radios are provided with such a control output which only carries +12V if the
radio is turned on.
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