A dedicated line is not needed and does not solve RF problems, esp. when you realize that most noise problems are caused by grounding issues and/or are generated by your components, not outside the line run.
Get rid of all fluorescent lights, and move the USB outlets and LEDs as faraway as possible. Make sure you have everything properly grounded, and get move your router away from the HiFi.
For a DAC, consider that it may want a low inductance cable run from the wall wart (not all do); you can DIY for ten bucks.
An isolation transformer is the size of an amp and can be had on eBay or elsewhere (I think they are being sold off my hospitals). You might need an electrician to wire it in. I would not bother unless I was sure I needed one...
Current thinking among (some) digital engineers is that noise is not just altering the DR of your music but is causing jitter. I will bet we see some improved DAC designs in the future.
Get rid of all fluorescent lights, and move the USB outlets and LEDs as faraway as possible. Make sure you have everything properly grounded, and get move your router away from the HiFi.
For a DAC, consider that it may want a low inductance cable run from the wall wart (not all do); you can DIY for ten bucks.
An isolation transformer is the size of an amp and can be had on eBay or elsewhere (I think they are being sold off my hospitals). You might need an electrician to wire it in. I would not bother unless I was sure I needed one...
Current thinking among (some) digital engineers is that noise is not just altering the DR of your music but is causing jitter. I will bet we see some improved DAC designs in the future.