Does Power Cord Require Burn-In To Sound Good?

Thanks for the responses. I'm seriously hoping for good things to come from this new cord as it's a pretty heavy investment for me. I hope this burn-in thing with cables is something that works ie. noticeably if not drastically improved sound after the whole burning in is complete.

Currently there’s a minor difference in sound quality between the new and old cord but I cannot say which sound I actually prefer at this point of time. Doesn’t seem to be a very positive outcome at the moment..

Hate to tell you, if it doesn't sound good right out of the box send it back. Yes burn-in is real. But it won't turn a sow's ear into a silk purse. What it will do, if the cable is any good then it will sound terrific right out of the box, and then improve a lot as it burns in. If it sounds worse than what you have, at 10X the price, send it back. Do not wait. Do not listen to any cockamamie stories. Just send it back.