The HD25 has a character that I've really never heard in any other headphone before. It seems to be scientifically engineered to enhance the livelier, more aggressive features of any music piece. Simply put, it's IMPOSSIBLE to relax with the HD25. Nothing sounds laid back on it, not even tracks that are MEANT to be relaxing and laid back! Piano sounds edgy, vocal sounds sparkling, bass is tight and fast and punchy. This is truly a DJ headphone through and through.
Even the reproduction of detail is unlike any other can I've heard. I can clearly hear things I could never hear before, even in tracks I know very well. I can hear a pianist turn pages and breathe in the background of piano tracks. I hear details I never knew were there. The balance of the HD25 is in a league of its own. With all my other cans, it was always a matter of more or less bass, mids and highs, of larger or narrower soundstage, but the overall sound reproduction was comparable. I could say that one headphone sounded better or worse than others in some aspects. The HD25 simply sounds... DIFFERENT. Nothing on it sounds like it does on my other headphones.
I've found an excellent deal on a pair of Amperiors, and I pulled the trigger. I want to hear for myself if the Amperior really is less grainy than the HD25, maybe a bit mellower.
Don't get me wrong: i really, really like the HD25. The problem is, i don't feel I can use it for every type of music, which is what I ask of a portable can. If a piece of music is supposed to be relaxing, I want it to sound relaxing. The HD25 seems utterly incapable of this! It has its very own way of making music sound involving, but it's not necessarily the best way for everything - or anyone. This is an excellent can, but certainly not a jack of all trades. Not even close.