Just read the paper 8740 thoroughly, with the help of a good friend. I can already tell HP1 is LCD2 v2, and HP2 is AKG K701. Sorry, I've done too many measurements! LOL
HP1: Audeze LCD2 v2
HP2: AKG K701
HP3: Bose QC15
HP4: AKG K550
HP5: Monster Beats LE
HP6: Crosfade LP
Dr.Olive's point is that the flat diffuse-field reference is not an ideal target for headphones, due to much deviation from subjectively assessed results. It is important to note that K701 and LCD2 v2 differ in 'headphonic' weight-class, considering how SUPER-linear LCD2 v2 behaves from the sub-bass to 10 kHz (with a slight nick, roughly -6 dB @ 4 kHz), not to mention that K701 loses a sub-bass response even with a slight acoustic leak due to its higher acoustic output impedance. LCD2 v2's sweet spot is relatively larger too, radiating the sound wave more uniformly. In addition, LCD2 v2 is one of the mostly diffuse-field response oriented headphones, if not better than K701.
Quite interestingly, Dr.Olive's assessment with the diffuse-field reference directly contradicts the finding from the paper 8744, which was presented at the same convention as well. The german Fraunhofer institute tells a totally different story, claiming the ISO diffuse field reference is, in terms of listener preference, on par with, or better than three different loudspeaker-matched references calibrated by 3 different expert listeners in a ITU-R BS1116-1 condition. Not to mention that Lorho's reference turns out to be a complete bogus! It is very fortunate I happen to use the same ISO target too.
BTW it is nice to see some blocked-meatus measurement results as well. As stated by Møller and Hammershøi, although interpersonal deviations may vary among different headphone types, there is definitely a chance for general agreement, much less deviating than open-meatus measurements.
Also it is very interesting to see LCD2 v2, which has an unexaggerated wide sub-bass response, was rated the flattest among other bass-boosted headphones without any type of tactile stimuli introduced. Is it possible that, as I have mentioned many times, a flatter & wider bass is more preferable than a simple boosted bass?
Edited by udauda - 11/6/12 at 5:55am