Break in period

Tube components take much less to warm up and or break in opposed to solid state.. However the real problem is not the topology used its the Capacitors.. The super tight teflon whiz bang Caps take some time to open up.. The oil caps take a little less, in between cheap caps are somewhere between those two on time to sound right... But all caps seem to be a little better with some age on them. Wire, Resistors etc.. Especially Tubes "Burning in" is more or less B.S. Although Can agree with above tubes can change character and smooth out with a few hours on them.
By the way this is just my own opinion on testing the waters and following things after changing out and modifying components.. Mostly it seems to lay claim for true when Speaker drivers or capacitors are involved, they do change and sound better with time.

I truly believe if and when "break in occurs" is basically you can kinda tell by the system just being more efficient and less congested sounding, whether turning up the volume or not.. Its got a looser feel to it, more detailed without feeling like your trying to push it out as hard.. This is my experience, now whether technical measured parameters can be prove on this or not is pretty much a pointless point. I have noted in the past there is a certain fluency that comes with a decent amount of hours on a system after time.. Cable break in is much less realistic, but in electronics a little can occur I feel, and definatley speakers I have heard become more fluent and intergrated with a better bandwith, now I guess if you measure a speaker for 20 - 20 without breaking in its all there, but some frequencys start to become more effortless and increase presence in time…

Why How or whatever reallly makes no difference to me, I mean I just don't get why this is such a Sin in audio to believe that such a thing can occur, No doubt its possible some systems simply sound great and maybe what one would think their best right away and they expect no more, but some can come into their own in time as well… Maybe its just you end up getting use to it, maybe cause all of a sudden your power company is supplying better power, and break in is just simply B.S. I guess some people look at this as an excuse for a not perfect performing out of the box design. So this is the only measurement I can give, if you feel 3 months later your system sounds more effortless and you don't think about it so much as to what you can improve, you have started your "Break in" period. Might happen for some, maybe not for everybody that has the sound they want out of the box already.     

Let me say I could give a story about an amp that on one speaker sounded very good, and horrible on another, until it played thru the other speaker for about 25 hours, and then it started to settle and play as if it was matched well.. Why? It could be as simple as everybody seems to want to argue, it has to do with the Load change, A 4 ohm speaker that plays down to 20 hz, vs. a 6 ohm speaker that only responds down to 37 hz might in fact cause a Different HEAT and load in certain bandwiths bringing the amp to use a Different and measurable electrical difference after burning it in... Litterally maybe the components Quite simply do Adapt to the different impeadences of the Preamp, or the CD player, Or the Tubes, Or the Speakers that one link to the other connects too..

This could also show why some say the best matches out of the box are from the same Manufacture connecting to each other as they were all designed in one very common domain of parameters to each other... So you take a Audio research preamp and hook to a Krell amp, well maybe those caps, transistors or Whatever are Working harder or easier to a different load and at some point they almost adjust due to simple heat and current driving the unit... I mean some Preamps seem to have better gain and bass hooked to a certain amp, or speaker right? Well its just possible there is a little varience and things do start to run and kinda Burn in to that electrical response over time?

I mean I have no idea if this could be true, or if any manufacture has measured something Running 100 hours on their own stuff and then Running it on something that is less compadable and finding the synergy match to move a little over time.. I know it sounds a little crazy but why not?

Kinda like how When you use PRemium gas in a car for 3 months that should be using Plus gas and then you go back to plus and things are not quite right till the computer re-adjusts..Yes this is not the best example but gets a point across...

Or how a Plasma screen sits in a position for a prolonged period of time and Burns the image of a video game ghosted into the screen or something, I mean we know this stuff can happen, so its possible this is part of what people start to hear if not using factory matched components, or speakers not voiced to certain amps whatever...

Just throwing it out there, although I am not backing this as true. But it seems to make some type of possible sense.