The AKG K240 isn't necessarily my first step into higher quality headphones. I did order them as a badly needed upgrade to my Bose AE2 headphones. However I've owned a pair of Hifi Man HE-400 headphones a few months ago. I sent them back because I couldn't appreciate the quality and wanted to conserve money.
Here's what I think of them when listening to Sunn O)))
http://www.youtube.com/watch?v=UYM2mm68_QQ - Sunn O))) - Orthodox Caveman.
So I guess it's fair to say this is my first real pair of headphones. Therefor I won't comment to deeply, because I don't have much to compare them to. Clearly they're different from my Bose headphones. They offer a fuller Bass sound. Going off my limited knowledge of sound, I can decipher some sounds louder on the K240s than my bose. Some sounds however are much clearer on the Bose. Since there are basically 3 types of frequencies I know of, bass, mids, and highs, I can say that the highs on the K240 are lacking a bit in detail. I can hear things much clearer in the Bose AE2, while the bass seems to muddy everything on the AKG.
Edit: so since giving my impressions I realized the stupid EQ of bass was on all the way on my amp! So nevermind.
I hope my description is articulate so everyone can understand what I mean. I don't feel very knowledgeable about sound by any means, I'm just winging it here. I'd like to know what others who have experienced these headphones think of them. I'd also be interested to know if there is a better headphone for me, these aren't completely satisfying (I do like them a lot and use them constantly though). I'm using a FiiO E11 amp btw.
Edited by Hifi Man - 5/13/13 at 4:09pm