drivers are different, yes.
but sound is not just drivers. it's everything else: the shape of the shell, the material, the pads, etc.

you said size. you're comparing the size.

a toyota corolla and an audi A6 might also have the same size wheels and yet.

you and einstein have the same size head and yet.

" if there exists an actual physical difference between the drivers of cheap headphones and lets say a hd560/650/600"
yes

"both the cheap and expensive headphones have the same dynamic 40mm drivers"
no.
they might both be 40mm ones though.

don't keep it in direct sunlight and openspace to collect dust, otherwise really doesn't matter.

there's countless reviews. feel free to use google.

the two parts of the sentence kinda contradict?

150$ devices have BT.

for example?

> it was normal for Studio headphones to have high impedance

it was because the output imp of source devices. it wasn't "normal", it was a must.

the illusion that you didn't waste a thousand bucks.

>How do the XM4s work when plugged in? Do they still get processed by the DSP or are the headphones passive?

you can have them on or off. Off they sound utter trash.

there's zero point for anything above mp3 for those headphones.

there's minimal diff between flac and 320mp3

opened a random AK player, 20 hours.
But you have to realize people these days demand super high res screen, super high res dac and whatever else components, all of that needs energy.

Same with phones. Yes of course your nokia 3310 lasted a week, but you played a little snake on it and that's it. Now you watch 4k midget porn for hours daily.

rule 2 has all the great answers

there's hundreds of articles/vids out there describing the difference.

feel free to google the hundreds of comparisons and reviews.

and I'd guess you need a grand for that tops

yes, but a 2 minute google search will tell you what living costs in thailand are.

For 2k$ you can live a quite nice life in thailand. Why say very simple?

yes, it will beat the headphone up with a belt

will you do heroin one of these days?

looks like b&o

teenagers.