Cable Break In for the Naysayers

Without any implied agreement or disagreement with the OP, the idea that "if it can't be measured it can't be real" (to paraphrase) cannot in any way be a valid position. (Not that above poster necessarily agrees with it either, while many do).  Science constantly finds better and better ways to measure smaller and smaller  phenomenon and more importantly - new ones.  That's like saying nothing new is left to discover.  Oh well... 

I've used cables professionally in live sound, movie production sound, recording studios and post production studios and have never noticed any difference in a cables sound due to breaking in nor has anyone I've ever worked with, including the best engineers in the world.  

If the frequency range or electronic character changed because of burn in it would be very easy to see these changes on a scope, no one has ever seen these changes. There are definitely burn in periods for headphones, speakers, amps, and even DACs but not cables they carry the signal the same way every time (if they are in good shape), and thank goodness they do if cables changed the signal imagine the issues in nearly every aspect of electronics. 

@akgwhiz @ozzy

You say "if it can’t be measured it can’t be real" as a false argument. You are missing something very fundamental in electronics and physics, frequency changes can easily be measured on scopes that are much more precise than anything you can perceive by your ears. The resolution that scopes can see is billions of times more sensitive than your ears and the neurons in your brain. A simple frequency recording screen grab when a cable is new then compared to when the cable is used for 150 hours or so is a picture that is has many magnitudes more information than is necessary to show that there is no difference in the way the cable carries the data. Sure some thing science can’t measure "how much do I love my wife" and such but frequency or electronic timing is what engineers do best in fact the most accurate thing humans do is measure timing it’s out to about 20 digits I think, just imagine if the cable the signal was flowing through wasn’t burn’t in or in some sort of in between stage of burn in obviously that would leave these timing mechanisms useless, but they're not. Hope that is clear.

It's a broad general statement that declares that "i know that there's nothing I don't know".  That's my only point.   It's an over-reach imho.  Im not at all saying that we can't measure countless things with instruments  better than we can ourselves.  I'm a scientist and over my 38 yr career in my field there were numerous developments and insights that were "impossible" or deemed impractical.   Until some became common knowledge to a high schooler.  Einstein didn't like the idea of quantum connectivity calling it a "spooky action over a distance".  We can now observe it, recreate it.  Next, quantum computing.  Just sayin.  Have you watched the YouTube of the Cal Poly guys showing that electricity isn't simply the flow of electrons down a wire but is a primarily a magnetic-induced phenomena?  It's enlightening.  EE isn't my forte but there's always something to be learned.

+1 for Bigtwin re red wine especially. Bottle shock, then meandering evolvement of the palate, aroma, and body. Very real!

same thing with cables. My most sensitive instruments- my ears- tell me so.