Do speaker cables need a burn in period?

He really loves it. Bad Kittyscat. 😼

https://m.youtube.com/watch?v=FWBUl7oT9sA

Is the hypothesis proposed that there is directionality inherent to wire, built into the physical structure and composition, even before it is ever connected to a voltage source, either DC or AC?

Or, is it that directionality becomes apparent only after connection to such voltage sources the hypothesis?

If the former, please explain what physical structures are fabricated into wire that determine directionality.

Otherwise, everyone here is simply full of it.

It's the latter.  It's only directional once you apply voltage and current.  

Now if you have a lot of time and you decide to swap ends on the cable every, say 5 minutes, while listening to music then it's no longer directional.

The wire in cables and fuses is physically asymmetrical. That’s why resistance measures slightly lower end to end one way than the other. Guess which way sounds better. 

Don't forget to burn in your connectors as well.  Sometimes it may take longer so I reuse my old connecxtors.  Also, the direction is being able to read the wire text from the amp to the speakers is correct.