Do speaker cables need a burn in period?

In the famous HiFi Tuning measurements of electrical characteristics of fuses of many brands including stock fuses, the lower resistance direction was always consistent with the direction that sounded the best, both for DC circuits and AC circuits. But as noted on the HiFi Tuning data sheets, the rather small differences measured did not account for the relatively significant differences heard in listening tests of “directionality.” And as fate would have it that’s how directionality can be controlled, by controlling the manufacturing process starting with the wire as it comes off the final die. I.e., it’s predictable. Hel-loo!

Do speaker cables need a burn in? Yes. If you have a good auditory memory and have listened to a song thousands of times then one can easily tell a difference. The sound is rather thin with a somewhat  narrow soundstage and some shrillness present. Next question. Time to rest this post.

I believe the "famous" measurements referenced by Geoff are from the paper linked below;
http://www.hifi-tuning.com/pdf/wlfr.eng.pdf
For an even more enthusiastic testimonial about audible improvements, refer to the Positive Feedback Issue 51 article by Myles B. Astor;
https://positive-feedback.com/Issue51/hifi_tuning.htm
Draw your own conclusions.

None of those numbers in that first set of data for FUSE direction 1 vs. 2 are qualifed as statistically significant. We’re talking differences in microOhm and there should be at least three measurements per trial so that a standard deviation is calculated. But of course, a single number stands as "accurate."

The directionality in our subjective minds is far more compelling than any microOhm differences. I’ll bet no one on earth can hear such differences, only if THEY WANT TO.

But put it under blinded A/B/X testing and the whole house of cards falls apart, which is why the proponents are so quick to avoid such testing. Oh, you mean you're telling me you can't hear with the lights out? Yeah, uh huh..

Cables don’t need burn in. Electrons are in orbital shells in the metal atoms and are not in the least influenced in any lasting or "memory" manner by current applied. This is silly to the point of hilarity to the point of sadness.