Maximum wire run for a certain power rate and wire gauge



Wire Gauge
5 watt
10 watt
15 watt
30 watt
50 watt
100 watt
200 watt
16
10,000 ft
7,000 ft
4,600 ft
2,300 ft
1.400 ft
700 ft
350 ft
18
9,000 ft
4,500 ft
2,800 ft
1,400 ft
830 ft
415 ft
205 ft
20
5,500 ft
2,700 ft
1,800 ft
900 ft
540 ft
270 ft
135 ft
22
3,400 ft
1,700 ft
1,100 ft
550 ft
330 ft
115 ft
60 ft
24
2,100 ft
1000 ft
700 ft
350 ft
210 ft
105 ft
50 ft




70.7V Loudspeaker Cable Lengths and Gauges for 1.5 dB Power Loss   (Source: RANE, Constant-Voltage Audio Distribution Systems):


Wire Gauge> 22 20 18 16 14 12 10 8
Max Current(A)> 5 7.5 10 13 15 20 30 45
Max Power(W)> 350 530 700 920 1060 1400 2100 3100

Load Power Load Ohms Maximum Distance in Feet
1000 5 0 0 0 0 185 295 471 725
500 10 0 93 147 236 370 589 943 1450
400 12.5 0 116 184 295 462 736 1178 1813
250 20 117 186 295 471 739 1178 1885 2900
200 25 146 232 368 589 924 1473 2356 3625
150 33.3 194 309 490 785 1231 1962 3139 4829
100 50 292 464 736 1178 1848 2945 4713 7250
75 66.6 389 618 981 1569 2462 3923 6277 9657
60 83.3 486 774 1227 1963 3079 4907 7851 12079
50 100 584 929 1473 2356 3696 5891 9425 14500
40 125 729 1161 1841 2945 4620 7363 11781 18125
25 200 1167 1857 2945 4713 7392 11781 18850 29000