Do speaker cables need a burn in period?

How come that every tweak is positive? Is it possible that something actually influences the sound in a non-favorable way? Is burn-in of the cables always something that should be positive, or does it have a negative impact on the sound, too? It might have not been said explicitly, but all the reviews mentioning it are glowing. It is always for better. What are the chances?

@blueranger 

So an electrical signal has no effect what so ever on a copper wire?

The more pertinent questions are whether the effect of an electrical signal can cause physical changes to the wire over time (i.e., during the "burn-in" period) and whether any lasting or temporary effects/changes can be measured or heard as a sonic difference between the sound pre and post burn-in.   The problem with these threads is that some here report hearing differences and others don't but neither camp has any level of "proof" that is sufficient to satisfy the other, hence the infinite loop argument.

Even if there sonic difference between the sound pre and post burn-in, has anyone ever reported it to be detrimental to sound quality? Anyone?

Yes! I burned in some interconnects on my cable burner in the higher speaker cable mode by mistake They sounded horrible, closed in and not dynamic. They settled down later.

Glupson. Have you heard the term electromigration? A current causes permanent changes in a wire