What Exactly Does "Burn In" do for Electronics?

you should visit Morrowaudio.com and read about cable burn in. Tons of great information, once read you will understand completely why this is required with all new equipment from cables to amplifiers.

Are you saying that you don't hear components break in or that you do and just don't know why?

It's a myth.

Search any topic on forum here and you'll see that there's overwhelming consensus on one's rig sounding best after about half an hour after turn on.

Cold, out of the box, not so good.

When brand spanking new, one can easily multiply that exponentially until, after awhile, half an hour is all you need.

Something has happened. Check out any spec on individual parts and you'll see optimum operating temperatures under which they are spec'd. That means they have to heat up some and not exceed those temps.

Again, cold out of the box, not so good. Warmed up, good. That should tell you something. Your pride and joy needs less time to sound good so what just happened?

I've heard the difference between brand new and broken in but others will tell you I'm crazy.

I assure you I'm not.

All the best,
Nonoise

I wouldn't waste too much time on explanations. These posts are from people who don't like audio and start arguments for fun.