All I was trying to say is that there should be such thing as an accurate headphone, because we know some headphones are more 'accurate' or 'true to source' to others. Unless there is some unreachable limits from laws of physics or what so ever, such headphone that can 'recreate the original sound it is transmitting...' is possible - maybe in an infinite future. And there exist one headphone that can perform the best at this regard right at this moment, as long as, again, if headphones have different levels of accuracy.
In fact, HeadFi comes from Hi-Fi right? Isn't Hi-Fi a short form of High Fidelity, 'The reproduction of sound with the minimum distortion, giving a result similar to the original'?
I agree with a lot of what you think. But to me, hi-fi is different to the best sounding pair. So in my definition, 'originality' is how well the system can reproduce the live, unplugged sound, and hence it should be objective (edit: or the way the producer intends us to listen, or maybe how he heard his music), and the sole point of reference one could describe a headphone. It would be fantastic if I can compare what I hear live, unplugged, vs what signal is being processed and presented in my years from that particular system. Like very fantastic. That would give an unbiased result of a headphones' performance (accuracy, neutral etc).
However, preference over the favorite headphone or the best sounding pair is subjective. So orange is the original piece of orange. In our ideal case all oranges sound the same. Now you can compare different by-products of orange and see which tastes the most similar to it (and it would have a definite answer), but I can strongly prefer a fanta over a fresh orange. Otherwise, what's the point of making fanta?
And at a certain degree, | agree with you again. Sometimes people just have to label a fanta as a bad copy of the original orange juice. What? They are for different purposes!
Similar thoughts as above, except if the measurements show a specific strong/weak frequency range, then its ability to produce the original sound would not be very fantastic...
Now if God let me choose a system that could 100% duplicate what the original sound was like, compared to a system that would make everything sound absolutely blissful...