Can an unused cable break in?


I bought a new $300 Audioquest cable about a month ago, hoping to improve the sound of my Cyrus CD transport.  It didn't improve the SQ even after a little  break-in period.   I compared it to another transport system I had and it was quite inferior. So I stopped using the Cyrus but left it plugged in the wall for the month.
Lo and behold, I compared the two transports today and there was virtually no difference in sound between the two of them.
I’m listening to the Cyrus right now and am thrilled with it.
Either it’s my imagination, or the cable broke in while unused!  The difference isn’t subtle.
Is such a thing possible?


rvpiano
One of the things that is different about power cords vs ICs and speaker cables is there is always voltage present as long as power is supplied whether or not the device is turned on. If the dielectric is the primary thing that burns in, it seems to me it is the capacitive property of the cable that is affected and current shouldn't matter. What say ye?
I agree with Millercarbon's comment about 'burning' in. In my 12 years or so of playing I have always noticed (almost always) that changing gear, cords, interconnects, etc. needs to settle in for several hours if not days to calm or whatever you want to call it. Enjoy!
The capacity of Humans for self-deception is apparently unlimited - Mr.Spock the Vulcan
Connecting to the AC Mains Supply Connect the socket on the AC Power cable to the AC Power inlet d on the rear panel of the CD t. Now connect the cable to a suitable AC power point. 

There is no mains power switch on the CD t. To switch off the mains supply to the CD t remove the plug from the wall outlet. For this reason, ensure that the plug is easily accessible when installing the unit
https://www.cyrusaudio.com/wp-content/uploads/2018/10/Cyrus-CD-t-handbook-en.pdf    


For burning in a power cord it will take for ever if the connected load is a CD transport.  It could take many months. It will burn in a lot faster if it is connected to a load like a dehumidifier or refrigerator. ( Make sure the ampacity rating of the cord is equivalent to 14 gauge wire.)  

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