Not sure if my experience will help, but I recently moved to a new house and had a dedicated AC supply wired with this cable -
https://mcru.co.uk/product/mcru-10mm-shielded-mains-spur-cable/?v=69e1aafeccc5
In my previous place, I also had a dedicated supply but wired with normal romex. Well, my system (no change before move & now) now sounds quieter with less background hash & noise, the midrange is richer and the top end resolution is better but sounds less sharp. I need to clarify that the room is obviously different with much higher ceilings (16ft. now vs. 9ft before) but leaving that aside, there is no doubt that the sound now is much much better.Hope this helps.
https://mcru.co.uk/product/mcru-10mm-shielded-mains-spur-cable/?v=69e1aafeccc5
In my previous place, I also had a dedicated supply but wired with normal romex. Well, my system (no change before move & now) now sounds quieter with less background hash & noise, the midrange is richer and the top end resolution is better but sounds less sharp. I need to clarify that the room is obviously different with much higher ceilings (16ft. now vs. 9ft before) but leaving that aside, there is no doubt that the sound now is much much better.Hope this helps.