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 What size wire should I use for my amplifier?

12 Gauge wire  is sufficient for head units, equalizers, electronic crossovers etc.
 Here is a wiring gauge chart.

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 Wire Gauge Chart
Params
1-4 Ft.
4-7 Ft.
7-10 Ft..
10-13 Ft.
13-16 Ft.
16-19 Ft.
19-22 Ft.
100 Watts
12
12
12
10
10
8
8
200 Watts
12
10
8
8
6
6
6
300 Watts
10
8
8
6
6
4
4
400 Watts
8
8
6
6
4
4
4
500 Watts
6
6
4
4
2
2
2
600 Watts
6
6
4
2
2
2
2
700 Watts
4
4
4
2
0
0
0
800 Watts
4
4
4
2
0
0
0
900 Watts
2
2
2
0
0
0
0
1000 Watts
2
2
2
0
0
0
0