Todd, for 100W and a 4 Ohm speaker load:
Code:
Wire Gauge
Run Ohms/Power 12 14 16 18 24
2ft Resistance .01 .01 .01 .03 .1
2ft Watts 100 100 99 99 95
10ft Resistance .03 .05 .08 .13 .51
10ft Watts 98 98 96 94 79
25ft Resistance .08 .13 .19 .32 1.27
25ft Watts 96 94 91 86 58
50ft Resistance .16 .25 .40 .63 2.54
50ft Watts 93 89 83 74 37
You can see 16 gauge handles it pretty well unless your runs are very long or you're competing (with equipment doing the listening). Very few people can tell the difference in a blind test once you go bigger than 16 gauge until you get to 11 on the dial. On the other hand, 24 gauge is good for about 2 ft.