Can anyone explain in laymans terms why your gear sound better after warm up

https://youtu.be/BDBa3asBm2I

Just posted today by Paul McGowan on YouTube

Run down the Street  
 now do a little stretching. 
 Now run down the street 
  Feel the Difference  
 

  It must be true
 Just posted today by Paul McGowan on YouTube

At Haywood310 I'm in total agreement with the ear drum protection, I will be listening for a while and its like someone turned the volume knob down. Weird I'd have to pop my ears to get the volume back. 

I didn’t read all the back and forth BS. I say ex many years ago I got an opportunity to tour the Mark Levinson factory in Connecticut. At one point we saw maybe a hundred preamps lined up being run in our guide had one of the engineers explain they burned them in for 72 hours to check for any anomalies, someone asked why no power switches. Engineer said the units need to reach Thermal Stability. 

Jus duz. 😉

From switching things around ion the sources, I have determined that the warm up is not for your equipment, but for your auditory system.  We learn to mask the bad parts and concentrate on the good.  Once acceptable, we simply enjoy the music, rather than worry about whether it sounds good enough.  As an example,  I do listen to XM radio on a Polk tuner.  At first, I hated it, but I can uncomsciously adjust my mind to truly enjoy the jazz station, 67.  More importantly,  when I put in a CD( or a good FM station afterwards, sometimes)  it really sounds good.

Is that your final answer?

I do listen to XM radio on a Polk tuner.

Chalk & cheese.

XM is bit-rate limited, time compressed and EQ'd.

Is your HiFi?

First off Thank you all for the detailed information and debate. I have
no idea what the average age of an Audiophile is? If I had to guess I would say roughly 50's. So that begs the question of Ear degregation and harmonics your are actually hearing. Are your Ears as good at hearing subtle clues as they were when we were 20? Doubt it. Pretty sure if you have spent enough time and money on this "hobby" You know good HiFi and not good HiFi but if your Ears are not calibrated like our equipment then that also lends to error or music mishap via bad equipment aka our Ears and the way our brain perceives sound. Just saying I am by no means any kind of expert. But I would be curious if there are or have been Audiophile Ear Exams... I know in the Military its standard procedure. Yes O311 Combat Marine over here. If I was in Arty I would be buying ART not high end Audio Equipment! haha

Again Thank You all especially to the owners that fund this site and the moderators that maintain it for allowing us to gain insite from actual users from across the Globe, Audiophiles and Music Lovers alike.Happy 2020 and Godspeed! To all Enjoy the music!

-Allgood