Do speaker cables need a burn in period?

Inna, are you suggesting I play my music quietly? I compete with low flying aircraft when i play my 'digital' music haha, I do have turntables, one is orf elsewhere (LP12), the other is still its box and not seen the light of day (MF round table), and the final one actually set up is a, wait for it......, a Music Hall USB-1 (stop laughing) for all those Goodwill vinyl purchases, of which I have bought many. lol.........

No, just play it any way you want to.
Low flying aircraft ? Hard to compete with. A few days ago there were a thunder and lightening over here and I thought - how can any audio system reproduce that ? Or record, for that matter. Crazy audiophile thoughts indeed.

IMO all audio equipment etc need a break-in (burn-in) period of time.

Your new running shoes will need more "burn" - oops! "break-in" than any speaker wire! 

My experience with the "break/burn In" is mostly yes it does make a difference. The Magnepan speakers took about 2-3 months before they came alive. I have a recently rebuilt before purchasing, Carver M500t amp that took quite a while to acquire that Class A musical kinda tubey sound. My 1 year old ART9 cartridge is still breaking in after about 350 hours of use and now sounds marvelous.