4. ELECTRICAL WIRING
20
ELECTRICAL WIRING
IMPORTANT! Disconnect the negative battery termi-
nal (GND) or remove the main fuse near the car battery
before you start any wiring work!
The power supply of the car audio system must be
disconnected until the entire wiring installation is
completed.
Use rubber grommets when running cables through any me-
tal or sharp plastic panels, to prevent accidental shorting or
shearing. Make sure the cables do not interfere with normal
operation of the vehicle.
Especially the music signal cables (RCA interconnects) should
be kept far away from any potential sources of electrical inter-
ference e.g. electronic vehicle management systems (engine
computers, relays etc.) fuel pumps, wiring harnesses etc.!
4.1 RCA INTERCONNECTS / REMOTE
LEAD
Carefully run the RCA audio signal interconnect(s) and the
remote switching cable from the head-unit to the amplifier.
The audio signal cables should be routed completely separate
from the power cables. Use only double or triple shielded quality
cables!
Connect the remote wire lead to the remote output of the head-
unit and to the remote input terminal of the amplifier. Finally
connect the RCA interconnect cable(s) to the respective outputs
on the head-unit and the RCA inputs of the amplifier.
4.2 LOUDSPEAKER CABLES
Connect the loudspeaker wires to the speaker terminals of the
amplifier. Use good quality wires of 2.5mm² cross-section.
When baring wires, remove approximately 6-8mm of the insu-
lation and after axially twisting the wires; insert the bare ends
into the corresponding speaker terminal output on the amplifier.
Be sure to follow correct polarity („+“ to „+“; „-“ to „-“). Tighten
the terminal screws on the amplifier.
4.3 CONNECTION OF POWER CABLES
Run the positive power cable („+12 V“) directly from the positive
terminal of the car battery to the amplifier. Make sure the power
cable makes good contact to the battery; i.e. use an approp-
riate battery clamp that accepts big gauge power cables! For
protection of your car audio system and your entire car against
electrical fire hazards from a shortcircuit of the main power
cable with chassis ground, you must insert a main fuse (holder)
within the first 30cm of the battery. The fuse type/value should
be matching the limitations of your main power cable and the
requirements of your car audio system, for example 80 A fuses
when using 35mm² power cable.
Now you route the ground cable to the amplifier. It is best to
keep the ground cable („-12V“) as short as possible, i.e. to find
a chassis contact very close to the amplifier. The ground power
cable must have the same cross-section as the positive power
cable. It is recommended to use a corrosion-resistant gold-pla-
ted power ring or a massive ground clamp between the ground
cable and the chassis ground point. Keep in mind that audible
interferences and problems originating in the power supply of
the amplifier, are mostly based on a bad ground contact. So a
good (and clean) grounding to the vehicle chassis is absolutely
crucial, to obtain best performance of your amplifier.
