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The following chart is used to determine the optimum recommended wire gauge size under continuous power delivery conditions. Amplifiers under real world conditions (i.e., playing musical tracks) will only deliver their "peak" power to the speaker system for brief periods. When using large wire sizes such as #4 GA or #1/0 GA, consider running the large cable from the battery to the amp rack, then using a distribution block that converts the large cable into smaller gauge cable(s).
| Power Wire Gauge Finder |
| total power |
15ft |
17ft |
20ft |
22ft |
25ft |
| 100 watts |
10 |
10 |
10 |
10 |
8 |
| 200 watts |
8 |
8 |
8 |
8 |
8 |
| 300 watts |
8 |
4 or 8 |
4 or 8 |
4 or 8 |
4 or 8 |
| 400 watts |
4 or 8 |
4 |
4 |
4 |
4 |
| 500 watts |
4 |
4 |
2 or 4 |
2 or 4 |
2 or 4 |
| 600 watts |
4 |
4 |
2 |
2 |
2 |
| 700 watts |
4 |
2 or 4 |
2 |
2 |
2 or 1/0 |
| 800 watts |
2 or 4 |
2 |
2 |
2 or 1/0 |
1/0 |
| 900 watts |
2 |
2 |
2 or 1/0 |
1/0 |
1/0 |
| 1000 watts |
2 |
2 |
1/0 |
1/0 |
1/0 |
| *all wire sizes in AWG |
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