18 Gauge V 16 Gauge. Of all the shotguns in the united states. 12 gauge guns are by far the most popular. Refer to the needle gauge chart to choose a needle gauge with an appropriate µl/inch before selecting a needle.
16 Gauge Zip Wire robotcombat.com
For higher power systems or longer lengths. 16 gauge is a great choice. For most low power home or car speakers (not subwoofers) 18 gauge (18awg) is fine. Gauge to thickness chart (click here for a printable pdf chart)gauge.