I am not exactly sure how old this thread is, but I'll bump it anyway.
There is something I, as a n00b, do not understand. How reliable are those graphs anyway? I mean, really? How are they made, and who makes them?
Also, I have figured out two ways to measure neutrality:
1) Relative neutrality. Pick a well recorded and well mastered track that has the full spectrum of frequencies. Listen to it through your test (°_°)phones. If some of the instruments (at the lower and higher ends) are difficult to pick out, your pair is not relatively neutral.
2) Almost absolute neutrality. Make a high quality binaural recording of your (°_°)phones. Then, listen to the source file and your recording back to back, through a good pair (can be the same one). If the altered!original and altered!altered files sound almost indistinguishable, then your test pair is pretty much as neutral as it gets.
Edited by KlarkKentThe3rd - 6/23/14 at 1:22am