Hey guys… Maybe chill out a bit… it’s not that big of a deal. It’s just audio. 
There’s no sense in ‘fussing’ at each other.
I read that review and happy you pointed it out. Interesting read for sure. It also shows how other things such as topology, power and temperature control can effect things. It wouldn’t be totally audible to human hearing, but it is interesting. Maybe that is why my motherboard audio sounded so bad? 
I’m more sad that we stopped talking about the endgame product known as audiophile rocks. 
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Yeah, Mon. I completely agree.
Cavelli was on another forum discussing it. It has something to do with alignment of electrons in the electrical components in solid state. It will/ did change the sound very minimally compared to tubes.
My point though is so of the generational manufactures of headphones and amps will practice burn in on their to of the line modes before they are shipped.
I’ve heard more than one answer the question with a yes, it’s real, it varies by model and build, and they can’t really measure it, but you can here it.
So I’m in the camp that is real. No way they spend electricity, employee time and admit to something that’s not real. I just think some headphones, speakers and amps do it more that others. It’s like do to material selection.
I’m just curious why I have to burn in my headphone and audio equipment, yet my bass guitar, amplifier, pedal manufacturers never suggested anything of the sort. If I burn them in, will I become the next Les Claypool?
There are discussions about guitar break in all the time, though? 
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Have one unused pair HD6XX in box. Could this type of test at some point.
My daily baby’s have been used.
Would bet they sound same or very near the same when slightly and gently pressing pads closer to head.
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The only thing that breaks in are the strings cause they will expand and contract based on use and temperature. But my E Chord will still be an E chord and tonally it wont changes. Tubes are a very very very different story though. Tubes are the caveat.
That said, in my 20 years playing saxophone, bass, drums and the bazouki (Greek instrument similar to the mandolin), I’ve never encountered a manufacturer suggesting as such.
What is your opinion on the intermodulation distortion changes Tyll found? Since you seem very dismissive of it entirely.
Tubes are on a bell curve, they sound better and better with more use, reach a peak, and then slowly decline
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I mean while it’s not burn in, my spring2 kte noticeably sounds better after having it warmed up after 30 minutes. Apparently that’s a thing with some r2r dacs
I think distortion is the one thing that can ultimately be discussed. The hard thing is to determine if that distortion has a pattern, if it exists concurrently, or if that distortion can be a man made or environmental error. I want to see more studies on the subject as it is the one part of the burn in that has the most credibility in my opinion.
Even in Tyll’s conclusion on his study, he stated that he couldn’t show IMD proves burn in. He himself suggested more needs to studied.
Cavelli talks about the electrons in the capacitor aligning and them heating etc… which is expansion. It will do this within a tolerance before resting at the desired sound.
The weird part is supposedly if they are not powered on for a extended period of time they can revert back to some degree, but will require substantially less time to" burn in" get back to normal.
I don’t know if anyone plays disc golf. The disc are nothing but fancy plastic. If they are under water for a week they fly different, if it’s cold the plastic stiffens and they fly very different, if it’s warm they fly very different. And over time from use they fly very different.
My point is even simple plastic is effected but temperate, and uses. We’re talking electrical moving parts they heat up and wear to a degree with use.
Logic dictates there has to be some level of change. The degree depends on components
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Speaking of r2r, perhaps hit up drop and see if you can get an airist in for review 
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I warm up the spark before I plan on using it… The spark literally warms up
Most other amp I have don’t… Likely the reason you see burn in with liquid spark.
I’ve heard a few designers speak of changes like this, burn in for solid state devices is a thing, but it can sometimes be so subtle sometimes to not make a noticeable difference, and other times an audible difference
Even though amp burn in can be prominent, I don’t mention it because if you just use the amp it will correct itself lol, it’s not as important as mental burn in or anything. I just encourage people to get time with their gear and actually get used to it before decisions are made lol
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100hrs and waiting…
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My favorite snippet from Tyll’s article is :
"The one thing I think I have proved, however, is that if break-in does exist, it is not a large effect. When people talk about night and day changes in headphones with break-in, they are exaggerating.
My hiking boots break-in; my sneakers break-in, too. But my hiking boots aren’t going to turn into sneakers over time. This idea that you simply must let headphones break-in before you know what they are going to sound like is a myth. And this data busts it.
I think there’s a little more to the story, though."
That little more is what @epic225 was mentioning in the above post he made and also, how/can we measure that?
Anybody interested in the article:
So I definitely agree with you on your point of view… I think even if burn in is a thing, then it’s definitely probably negligible.
But I do believe the subject is severely under-researched to merit any reasonable good-faith argument, though… for or against.
I think it’s reasonable to conclude that “burn in” doesn’t matter based on what we know as facts… but the problem is those facts are very thin…
It’s like living next to a lake you fish in everyday. And in all that time you’ve never seen a blue fish. So it’s reasonable to conclude there are no blue fish in that lake. But have you actually taken the time to scuba dive and search every inch of it? I think in the case of “burn in” we haven’t done anywhere near close to that. And so if someone else wants to say they believe in burn-in, I can’t really “deny” them that… If that makes any sense.
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