Speaker Break In...? Or listener “Break In”?

@unreceivedogma- Changes in temp and humidity, are also mentioned in some of the above studies, as affecting TS parameters. Then too; sound propagates somewhat differently, with those changes. The disparity of aural acuity, between individuals(not to mention training/experience/perception and maybe: simply denial), is why(I’m certain), some don’t/can’t/refuse to hear the changes made by fuses, cables and speaker break-in. I don’t believe EVERY system, goes through(or- can resolve) changes that ARE audible/obvious. Some, no doubt, simply want to enjoy their music and not be bothered with listening that intently. Some of us have engaged these issues professionally. So many variables!

Regarding Thiele-Small Parameters, which ARE measurements, and DO change with break-in: http://audiojudgement.com/measuring-thiele-small-parameters-part1/ As I stated earlier, "That’s just simple mechanics." "There are also mechanical changes which occur in the moving components during use. In this case, however, most of the changes seem to occur early in the life of the driver, and are almost certainly due to relaxation in flexing mechanical parts of the driver (e.g., surround, spider, etc.). SEVERAL STUDIES HAVE BEEN PUBLISHED documenting substantial changes in the T/S parameters over the first few hours of use, some parameters changing as much as 15%+ over these initial periods.", is how this article describes it, under, ’Lifetime Changes, in Driver Behavior’(toward the bottom of the page): http://usenclosure.com/TS%20and%20Company/Thiele_Small%20Life%20and%20Times.html

".....you could argue there is a difference, but it’s negligible, most certainly unnoticeable in the real world." Yet, you’ll debate the directionality of fuses/wire, as being audible, which differences are infinitesimally small. Give me a break!

Magnepan recognizes, that it’s speakers have a, "break-in period’(second page of their 20.7 manual, last paragraph): https://www.magnepan.com/pdfs/manual/MG-20.7.pdf One would think, a major manufacturer like Classe’ would know better: https://manualsdump.com/en/manuals/classe_audio-ca-m400/10994/8 Or Wells(under, Proper Care): http://www.wellsaudio.com/akasha-manual Hell, even Bass players are aware of the reality(under, "WE USED TO HAVE SOME SOUND FILES (HERE)" : https://barefacedbass.com/technical-information.htm Of course; your ears and opinions may vary, but- who cares?   If ignorance is bliss; some here must be experiencing Nirvana.

@mijostyn- You began your post, mentioning pain and ended with, "fiction". Those two words bracket, what they so aptly describe.

How about the fact that there are a plethora of designs, incorporated in speaker systems(ie: domes, cones, ribbons, Mylar diaphragms, horns, two spiders, one spider, horn loaded, bass reflex, acoustic suspension, cloth or rubber surround, etc), each of which will make a difference in how long the suspension will take to loosen up. Then there’s the wide disparity in SPL levels, between different listeners. Less excursion has to result in longer break-in(or whatever your term). That’s just simple mechanics. Got a crossover? Anyone that’s been around electronics, should recognize how long capacitors take to form. The better the dielectric, the longer they take. And yeah; psycho-acoustic studies do indicate our brains compensate, over time, for what seems wrong.