@curiousjim "I have bought six or seven different power cords, none over $500 and have noticed little or no change in the sound of my system"
correct! good quality equipment must supply sufficient power cable, some brands like Esoteric have “upgraded” power cable option available for extra charge.
if someone can “hear” sound improvement after replacing power cable, before claiming power cable problem I would in details, for example what cable was replaced, outlet degradation issues etc. In many cases de-ox spray fixes contact issues, w/o changing need to replace cable.