@clearthink I understand that a power cord is a passive device. But if "enhanced" power cords make a "change" to a listener's system, then is supposedly does "something". If a new and expensive P/C makes any change to the power from the wall socket, it's not going to be a good one.
A good P/C from a conditioner may be another thing altogether. It didn't work for me. Maybe my system isn't revealing enough, or needs a few $0,000s worth of tweaking material?