Cable Burn In


I'm new here and new to the audiophile world. I recently acquired what seems to be a really high end system that is about 15 years old. Love it. Starting to head down the audiophile rabbit hole I'm afraid.

But, I have to laugh (quietly) at some of what I'm learning and hearing about high fidelity.

The system has really nice cables throughout but I needed another set of RCA cables. I bit the bullet and bought what seems to be a good pair from World's Best Cables. I'm sure they're not the best you can get and don't look as beefy as the Transparent RCA cables that were also with this system. But, no sense bringing a nice system down to save $10 on a set of RCA cables, I guess.

Anyway, in a big white card on the front of the package there was this note: In big red letters "Attention!". Below that "Please Allow 175 hours of Burn-in Time for optimal performance."

I know I'm showing my ignorance but this struck me as funny. I could just see one audiophile showing off his new $15k system to another audiophile and saying "Well, I know it sounds like crap now but its just that my RCA cables aren't burned-in yet. Just come back in 7.29 days and it will sound awesome."
n80
With Cables its pure snake oil. Once you have a good cable with
low resistance or known resistance and sized right for the application
and in your case proper shielding you are done. What you hear is what you get. The rest is pure fantasy.
The RCA cables I bought (the ones on which this thread is based) are also directional. They have a tag on them for the source end. I did not notice this when I ordered them. 
The RCA cables are most likely only directional in the sense the shielding is connected at one end only. But the RCA cables are probably not directional in the sense I use the word, which is due to the inherent directionality of wire. 
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+1 elizabeth, I totally agree although I do use my Audiodharna cable cooker since I have one.