Do speaker cables need a burn in period?

The question to ask (from my college Psychology 101) is can you step into the same river twice?

In the same vein, can you listen to music on the same cable twice?

To be ahead of its time. Yes.

Just wonderin'...

Anyone with experience with CRYOed cables - i.e. do they require more or less cookin' and burnin' ?

100% believe that any new audio equipment needs some hours to settle into its "groove" before sounding its best.Same as new cars dealers tells you to keep it simple for xxx amount of km then you can open it up.Yes Im comparing mechnical to electrical products but from the decades I spent in audio not counting the $$$ I spent I notice a improvement as the equipment breaks in.Can I prove it.Of course not but from personal experience it takes about 200 hours before the changes stops.

 Im comparing mechnical to electrical

Actually there is nothing different from "mechanical" and "electrical".  They are all made of electrons, protons, neutrals and so on.  We human beings are guilty of such categorization that leads to falsification.  Mechanical and electrical "break-in" is just the same in term of atoms or molecules aligning themselves.