ps7256
The ideal of 20amp or even 30amp from your circuit box and appropriate gauge electrical wiring would be idealA 30A line would be problematic because it would require a 30A receptacle. That won't be compatible with the plugs on your audio equipment, and I don't see any value in changing them to accommodate the 30A line. It would be better to use a 20A line and derate the cable to 10 AWG, which will help reduce voltage drop on the circuit.