Dedicated 20 Amp Line for Audio

It could be either way. I connect all to the one circuit.

One thought is to run 2 lines (circuits). One for digital and one for analog. That said, one line is sufficcient, especially if you have a power conditioner which separates the components plugged into it.

For the current draw of most audio systems, one should suffice nicely. The amp is the most significant draw, and many really don’t draw a lot. CD players, DACs, TTs draw very little. Isolating the analog and digital components is a nice approach.