@johnto Flip that idea around. It is the first 5-6 of power that your component sees on it's way to the power generation source. I hypothesize our components are making a fair bit of noise internally, which propagates back into the your house AC, and into your other components. The better cords filter out more of this back propagation. I have found the Shunyata NR cords to provide a noticeable improvement in sound quality. This hypothesis (not original to me) might be the reason why.
