NONBELIEVERS: Hear me.
I'm an EE since 1980. I would never fall for this noise people emit about cables making any difference -- audible or measurable. In the 80s and 90s I worked designing custom integrated circuits at a couple of the big-name manufacturers here in the US.
BUT THEN IN 1989, working through a pair of Mc60s, after recap, metal film, tube rolling, etc, I heard a *definite* difference in current-adequate power cables. Imagine my hard head being forced to believe. But there it was. A clear difference in clarity of bass, mids, and highs.
So now I am converted. I know less, but I have heard more, and I now believe. You should too.