Regarding the "it's all in your head" theory proposed by members in this thread - one cannot assume that because they could hear no differences between power cords in their system that power cords will not change the sound in other locations and/or in other systems. There a number of variables at play, not the least of which is the equipment being used. What may improve the sound substantially in one system may not work well at all in another system or may not have any impact at all in a third system.

I would suggest we consider the components in the system, the quality of the power in the home and a bunch of other factors before we jump to explanations like the placebo effect.

Roon, MS600, Simaudio 780D, Simaudio P-8/W-8 and Revel Studio 2s