So... I've been using these headphones for about a week now... I expect I have at least 30-40 hours on them. I've found them to be great overall, but just a tad too dark for my tastes.
As an experiment, I bought an equalizer app for my iPod Touch (called eQu). It's a clumsy to use app, but it lets you shape your equalizer settings between 32Hz and around 15kHz, by creating points and dragging them around on the eq curve. I presume it calculates a spline, but I don't know.
Anyway, I took the Headroom frequency response curve from the ie8 page on headroom as a basis and created a a curve which is a flattened inverse of that FR graph... flat to 1kHz, +3dB at around 4.5kHz, drops down to maybe 1dB at around 8.5kHz, and back up to +3dB at 15kHz and tried out a variety of music.
To my novice ears, it brings the treble to life without impacting the mids or bass. And seems to bring these headphones into a nice balance.
I know better than to try this with analog equipment but I don't think there's much impact to SQ doing this in the digital domain to the original digital signal (provided the app is coded well).
Anybody have any thoughts on this? Any insights worth mentioning?