But generally, if you have a noisy wall wart type of adapter putting them on a separate circuit than your audio system is a good idea
Better, but the rubbish still all ends up on the same active neutral and ground back at the fuse box. So it still gets into the the household wiring.
Best is big Isolation transformer, followed by a medical grade Siemens brick size noise filter. But not for the power amp, that has to go straight into the wall for best results from it.
Look at my thread here about it
https://forum.audiogon.com/discussions/get-the-best-from-your-system-while-listening-without-any-cos...
Cheers George