Power cord - 5 ft vs 10 ft ?

Jim from wisdom cable recommends 2 meters.He is very knowledgeable.

Jasonborne plainly he does not believe cable can make the system sound better, I respect that? Yes Thymame I also notice Jasonborne either he is first or second to post.

Long enough to connect without straining, large enough to carry the required load, and as well insulated as you can afford/justify within reason.  I run 6 foot AudioQuest NRG-4 to my PS Audio Powerplants and 3 foot AudioQuest NRG-2 from the Powerplants to the components.  Sounds wonderful without breaking the bank.

It's not the length so much as the girth that's important.

Most of my power cords are of the DIY persuasion and I have a nice stash of Oyaide 046 and 004 plugs.  I bought a few hundred feet of rather good silver plated solid core copper wire some years ago and have built several power cords of varying lengths, from just a couple feet to a few meters.  I've used these on all my components over the years and yes, I have experimented to see if a short cord sounded different than a long with the same wire and plugs and I really couldn't discern a difference of any significance.  There might have been the slightest of differences but, in my systems and to my ear, it was truly negligible.