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Car Amplifier Power Cable Requirements


|Technical Home PageSpeaker Impedance
Power Cable Requirements | Amplifier Safety Tips | Enclosure Design
Calculating Amperage Draw | Exit Tech Support

  • Amplifier Power Cable Requirements

Selecting the power and ground wire size is an important part of the amplifiers performance and safety. Thicker wire delivers more current when needed. 

In order to select the proper gauge wire you will need to determine the maximum current draw of all amplifiers and processors that you will connect with this wire.  You will also need determine length of wire needed to connect from the battery to the location you mount your amplifiers. 

  • Recommended Wire Gauge

The following graph is the recommended wire size based on the systems current draw and length of  wire needed. 

A
M
P
L
I
F
I
E
R

A
M
P
E
R
A
G
E

D
R
A
W

125 - 150A 4
 Gauge
4
 Gauge
4
 Gauge
4
 Gauge
2
 Gauge
2
 Gauge
2
 Gauge
105 - 125A 8
 Gauge
8
 Gauge
8
 Gauge
4
 Gauge
4
 Gauge
4
 Gauge
2
 Gauge
85 - 105A 8
 Gauge
8
 Gauge
8
 Gauge
4
 Gauge
4
 Gauge
4
 Gauge
4
 Gauge
65 - 85A 8
 Gauge
8
 Gauge
8
 Gauge
8
 Gauge
4
 Gauge
4
 Gauge
4
 Gauge
50 - 65A 10
 Gauge
10
 Gauge
8
 Gauge
8
 Gauge
8
 Gauge
8
 Gauge
8
 Gauge
35 - 50A 10
 Gauge
10
 Gauge
10
 Gauge
8
 Gauge
8
 Gauge
8
 Gauge
8
 Gauge
20 - 35A 12
 Gauge
10
 Gauge
10
 Gauge
10
 Gauge
10
 Gauge
8
 Gauge
8
 Gauge
0 - 20A 12
 Gauge
12
 Gauge
12
 Gauge
12
 Gauge
10
 Gauge
10
 Gauge
10
 Gauge
 
Feet
4 -7
Feet
7 -10
Feet
10 -13
Feet
13 -16
Feet
16 -19
Feet
19 -22
Feet
                           LENGTH OF WIRE

|Technical Home PageSpeaker Impedance
Power Cable Requirements | Amplifier Safety Tips | Enclosure Design
Calculating Amperage Draw | Exit Tech Support

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