Hopefully, you can sell the expensive power cord and get most of your money back and be glad to have the cash to spend on something more beneficial. To my ears, upgraded power cords, and cables for that matter, have made a subtle but noticeable difference, certainly not a night and day improvement. I think we all hear a little differently and that doesn’t mean that others wouldn’t hear more of a difference or maybe none at all. I’ve tried out more expensive switches in my system and I just don’t hear a difference between those and something cheap from Best Buy. Doesn’t mean that others Wouldn’t hear a difference and I don’t think it means that my system is not resolving. It’s just the way I hear it personally
I was glad not to spend the money which I would’ve done if I could hear a benefit. Folks who use their own experience to invalidate someone else’s are off base in my opinion. We all hear a little differently