https://www.rtings.com/headphones/tests/sound-quality/passive-soundstage
Are you invalidating all of these measurements?
Saying that technicalities cannot be measured?
You guys sure do measure an apple dongle and say is all you really need.
But when it comes to technicalities everyone agrees that they are subjective?
i think there’s a statistical and slightly blurry baseline below which something is going to be amiss and above which people will generally spot a difference. thereafter it’s preference.