Richard Vandersteen assured me that their supplied power cords are all you need, and you wouldn't get improved performance with others. I just happened to have a couple of Elrod cords sitting unused, so what the heck, I gave them a try, and was very glad that I did. I definitely found it worth using them.
I'm surprised by Millercarbon's reply, as he states in another current thread that everything makes a difference - - a sentiment that I agree with.