It is recommended that you use 12 gauge cable for your speaker connections.  Twelve gauge is rated as among the best.  You need something that has the strength and durability to withstand more than everyday use.

No one needs to tell you that your cable is your sound. Superior wiring allows your signal to be quiet, eliminating frustrating hums, buzzing, and crackles.

Sturdy construction of the right 12 gauge cable really enhances signal and performance. Something with a flexible design eliminates kinks and twists for in the cable for a tangle-free performance whether you’re in the studio or on the stage.