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3 - Cabling
WARNING
If there is a doubt as to your ability to install the amplifier and to cable the system properly, get a
Focal distributor to do it for you.
WARNING
Before you begin the connection phase of set-up, remove the vehicle battery’s negative (-) terminal.
(fig. 1).
CAUTION
Avoid routing power supply cables close to low-level input cables (RCA), to your car’s radio aerial, or to
sensitive units. High-current power supply cables can cause static/interference that affects audio signals.
CAUTION
Keep cables as short as possible to optimise the system’s set-up performance and to reduce
signal loss.
3.1 - What power supply wire gauge should I use?
Amplifiers Main fuse Length of Cable in Metres
0-1m 1-1.8m 1.8-2.5m 2.5-3.3m 3.3-4.1m
4.1-5.6m 5.6-7.1m
Power 2.75 1 x 40A
8mm
2
10mm
2
10mm
2
16mm
2
16mm
2
25mm
2
25mm
2
8AWG 7AWG 7AWG 5AWG 5AWG 3AWG 3AWG
Power 2.150 2 x 40A
16mm
2
16mm
2
25mm
2
25mm
2
35mm
2
35mm
2
53mm
2
5AWG 5AWG 3AWG 3AWG 2AWG 2AWG 0AWG
Power 4.75 2 x 40A
16mm
2
16mm
2
25mm
2
25mm
2
35mm
2
35mm
2
53mm
2
5AWG 5AWG 3AWG 3AWG 2AWG 2AWG 0AWG
Power 5.500 4 x 30A
25mm
2
25mm
2
25mm
2
35mm
2
53mm
2
53mm
2
53mm
2
3AWG 3AWG 3AWG 2AWG 0AWG
0AWG 0AWG
Power 1.800 3 x 30A
16mm
2
16mm
2
25mm
2
35mm
2
35mm
2
35mm
2
53mm
2
5AWG 5AWG
3AWG 2AWG 2AWG 2AWG 0AWG
AWG : American Wire Gauge
07
installation