Beeing sound / recording engineer with an additional electrotechnical engineering background does not qualify me for anything, per se.
It does mean that I have a deep insight in the practical AND theoretical basis of acoustics and electronics.
Doing recordings for several decades now - means doing A/B comparisons all day long, with the original acoustic sound as reference - has trained my ears for sound differences, and much more.
Music that ends up at your ears is created in a long chain that does not start with your DA converter, but in the recording studio, in front of the microphone.
Decisions made here have much more influence than any cable or amplifier on your side ever can.
"PRAT" is created in the studio, by the musicians - or not, if they and the producer fail.
The dominant item, where the biggest sound changes happen, is the selection of your acoustic transducer.
No two headphones models sound the same, neither do speakers in a room.
This part is, as sound engineers and producers, our biggest single point of the concern:
how does our work sound at the consumers side.
Personally I would not like my recordings to sound like they do from the HEDDphone on my ears.
Fortunately, for me, soundwise the HEDDphone is an outlier compared to what's usual.
Taste is a very personal thing, and all ears and listening habbits are created different.
HEDDphone seems to fit to your ears.
There's nothing I could and would say against this.
The other way round,
my personal taste :
I'm testing the HEDDphone for one week now, and the more I use it the less I like it.
The only reason I did this that long, is the praise that is going on here, and the HEDDphone's A.M.T. technology I had high hopes on, tried to find out what's about it.
HEDDphone is not for me.
PERIOD