@offbrandracing,
I would run 10/3 MC (metal clad) cable with solid copper core conductors from the breaker panel to a metal receptacle box. The metal sheathing on the MC cable absorbs the electric fields emitted by the wires and shunts it to ground. Now from panel to plug is shielded. The advantage of MC cable is low line noise and reduced antenna effect on AC power lines/branch circuits. I would run at least two dedicated 20 amp lines for audio. 😎
IMHO,MC type cable (3-wire plus insulated ground) is currently the best choice for non-isolated ground circuits for audio.
Mike
