E12's boost is nowhere near 6dB. It's closer to 4dB, if even that.
And it doesn't seem to boost anything beyond 150Hz. Any boost that goes beyond 250Hz would unfortunately bleeds into lower midrange, and I don't think that's favorable, unless you have a superbly cold and sterile headphone.
Where did any of those numbers come from?......... Are you using your ears and determining an estimate of how much boost there is and past what frequency it stops affecting?... If they've implemented a near 6 dB boost then a near 6 dB boost it is. Not only do your cans influence the difference you're perceiving, there's no way to come out and just say that there is exactly this amount of frequency boost vs. whatever other value (especially when it's so generalized), and the volume that you listen at highly affects the relative decibel value as well. I'm not sure what you were trying to prove with your post. At least if I knew that, I'd then also know what to respond to and be able to disregard the blatant lack of self-doubt. With no intent to offend, treat this more as a question than a dismissal. Try and assess why you stated those approximations as you did and get back to us with that. I'd actually like to know if there's anything behind that.
I wasn't making an argument that having tested the E12, I perceived way too much of a boost in low frequencies (for my headphones) - nor should I have... The only thing to possibly debate on that front is how well it's implemented (e.g. your mention of when bass boost goes past the 250 Hz range, it often messes up the balance).
EDIT: And btw, I'm mostly referring to the new curve and it's actually closer to 5 rather than 6 as I have been mentioning. That doesn't change anything I've said as initially it just stuck out this way (as 6 dB) because of the instant association I had/have of 6 dB translating into twice the pressure.
Edited by Typhoon859 - 2/15/13 at 4:37am