Recommended Power and Ground Cable Sizes & Speaker Wire Size and Length
To calculate the proper power and ground cable sizes, find the distance of the power cable
along the top row. If your measurement is between two measurements, use the higher one.
Next, find the total RMS power the cable must support on the left. If your measurement is between
two measurements, use the higher one. The size listed where your two measurements meet is the recommended
* Note: These figures have been rounded off for easy reference.
Ground cables should be the same size (or larger) as the power cable. ** Current Draw figures are based
on RMS Power of the amplifier with a 50% efficiency rating.
*** Although wire gauge sizes smaller than 10 gauge may be acceptable for the amount of current draw, we recommend using 10 gauge as
the smallest wire size for any amplifier of 100 watts or more.
The goal is to provide as much current to the
amplifier as it could possibly need for optimal performance.