Well, I like my treble kind of dark because my tinnitus can't handle a lot of treble. Well, it can, but only for a short period of time. That's why I liked the treble on them.
I'm not trying to brag, but on my ad2k mkivs, I can feel down to 2Hz (not 20Hz), so your'e assumption that headphones can't go that low is wrong. I actually blew one of my ad2000 drivers before because I accidentally knocked up the volume when it was playing at 20Hz...had to buy another one.
Anyways, I just shipped out my MA900s this morning for a return. Goodbye headphones! I'm thinking about waiting for the AKG 812 to come out so I can direct order their drivers. Since they're 53mm large, they should be able to fit in my AD900 chassis with minor modification, since it accepts 53mm drivers.
I know right? I can feel down to 1hz but nobody believes me