I did read the papers, that’s why I mentioned AES and Klippel. They explicitly show that thermal compression is measurable and has been measured. That’s exactly my point: it’s not sorcery, it’s physics.
The cartoon was only humor to illustrate how some people dismiss obvious physical laws. My explanation wasn’t “ambiguous verbose,” it was simply stating Joule’s law applied to a voice coil: when current flows, it heats, resistance rises, current drops, output falls. That’s the mechanism behind compression.
So yes, we agree it’s a scientific matter that can be measured. The only difference is: I don’t downplay it as trivial, because the measurements show it happens even at moderate levels. That’s the discussion worth having.
Yes, the "mechanisms" you love to repeat are known since long - we did not have to wait for AES and Klippel to know about them, although you just parrot the usual sentence from the Klippel introduction.
No, the question is that you are not able to show measurements carried in realistic conditions that show that thermal compression is significant at typical audiophile sound levels in top box high-end speakers, although measuring them is nowadays very simple.
So your insinuations are unfounded - they are just an audiophile myth. If you have read the papers you have noticed they addressed PA levels, not domestic sound levels, or poor performance speaker units - they wanted to show the effect clearly.
Surely high-efficiency speakers in general can play at maximum levels louder than low efficiency speakers. But this is not relevant for 99% of the audiophiles, except in shows or when they want to impress friends.
BTW, if you care about thermal compression you should hate vinyl - the thermal compression in cutter heads is significant and curiously much more discussed.