HAHAHAH again with the comedy for audiophiles!! LOL SO this guy wants me to show proof of amps that are different and sound different? hahaha I tell you what... Why don't you show us proof of amps that are different and sound the same hahaha I bet there are a few findings in the thousands and thousands of amps available in this PLANET that sound "almost" the same. Now compare that to the millions of combinations I can give you of "X" amp vs "y" amp that sound different..... do you SEE whats happening here? a big LOL and im not even good at math nor I have a golden tiny calculator with quantifiable graphs !!!
You sound like a mad scientist straight out of a horror film gone wrong.
Castleofargh and others here have already stated there can be differences between amps and other audio equipment but whether the differences should be audible is up for debate, basically solid state amps, audio cables excluding tube amps. (minus headphones/iems as they obviously can easily be shown proof that transducer sound measurements can fluctuate,etc). A good subject brought up long ago was that aftermarket audio cables with varying specs and incredibly sensitive IEMs with wacky impedence/ohms can change it's frequency response.
But that is just one realistic example of how an audio cable can change the sound.
But as I was told, the debate here is whether aftermarket audio cables and (why the heck not, just include solid state amps) really do realistically change for audiophile headphones that live up to the reviews that are put out. "Etc, this silver oxygen purity free cable sold for 2000 makes the punchy bass and the treble sparkle and mids smooth, oh man just listen to the timbre and it makes everything musical and warm".
Now again, this goes psychology and social grouping.
There are popular reviewers who make reviews for various audiophile products and inserts subjective terms such as above not taught by any musician certified with a masters at least where I currently study. Now for instance, take one reviewer who is reviewing audio cables and tells their viewers to buy this name brand over the others.
He/she suggests that this brand of cable has sweeping mids and sings musical with a non heated treble. But provides no recorded graphs or substantial evidence that it is much better than another name brands audio cable.
Naturally, if someone were to criticize that audio review, his fans/her fans will come to rescue due to their social group patting themselves on the back on the belief they have a superior audio cable based on what one person says.
You can actually do this test yourself, purchase some high quality audio cables you can buy on amazon for less than 30 usd. Gregorio and bigshot a long while ago gave some recommendations. Monoprice cable you can buy for affordable price about 17 a foot maybe? On amazon. Go to a headfi meet, find a table where you can hide the cables under a blanket and tell fellow members that it is "insert popular audio cable name" and tell them that the famous reviewers on headfi said so and so that these audio cables make your sound have sweeping mids and musical/warm and sparkly treble, high resolution and detail that snatches all the micro details you can imagine.
The people when they listen to it, the first thing that comes to their mind is that they are already convinced the sound is warm and musical and the treble is sparkly because a popular reviewer has told them this, it spreads. Just don't let anyone see the actual cable underneath.
If you do have golden ears you may be the first into a world record that you have the hearing ability of a bat or a dog far beyond human limitation.
In another post you even went so far as to tell
@gregorio that he should just listen to beats then. That makes no sense? What if he has headphones that is well within his means of affordability, well built electrical specs, and other features?