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(Total RMS power output into 4
W
W
) x 2 = (Total input wattage [Watts])
(Total input wattage)
= (Maximum input current [Amps])
(Supply Voltage)
Example: Amplifier with a rating of 100 watts per channel into 4
W
W
200 x 2 = 400 Watts (Total input power)
400 Watts / 12.5 Volts = 32 amps (Total maximum draw)
Use this value of current draw to determine wire size
from the chart below.
Power Wire Chart
Minimum Gauge wire
Draw Up to 4 to 7 to 10 to 13 to 16 to 19 to 22 to
(Amps) 4 ft. 7ft. 10ft. 13 ft. 16 ft. 19 ft. 22 ft. 28 ft.
0-20 14 12 12 10 10 8 8 8
20-35 12 10 8 8 6 6 6 4
35-50 10 8 8 6 6 4 4 4
50-65 8 8 6 4 4 4 4 2
65-85 6 6 4 4 2 2 2 0
85-105 6 6 4 2 2 2 2 0
105-125 4 4 4 2 2 0 0 0
125-150 2 2 2 2 0 0 0 00
Power Cable Calculation
KX100.2 & KX200.4 Technical Manual
Version 2.0
Page 18