Originally Posted by rhythmdevils
Was the goal really to make them sound the same? So after 23 years on the market, they change the material of the cups, don't try to improve the SQ, and expect us to pay more? Um.... How about they keep their fancy 8 minute cups and make a better headphone?
Uhh, Tyll's review stated that the cups have improved the sound quality over the HD-25 BECAUSE of the new cup material.
"The big surprise for me, however, was that the subjective difference between the plastic versions of this headphones and the aluminum Amperior. The effects of the small amount of extraneous noise in the less stiff housings of the plastic headphones was quite obvious. While the HD 25-1 II is a good sounding headphone, I would characterize its performance as "very good mid-fi," while my experience with the Amperior reached what I would consider "entry-level audiophile" performance. The Amperiors are the best sounding supra-aural sealed cans I've heard to date, handily besting the DT1350, V-Moda M-80, and, of course, the HD 25-1 II. I love these headphones.
Previously I've felt the HD 25-1 II had a bit of an edge to them, in the case of the Amperior the highs are simply clear and articulate; there may be the slightest edge to the sound, but it's not bothersome in the least. Sure, they don't manage to pull off the airy, spacious highs of reference quality cans; and neither do they deliver the liquid coherence and transparency that a full-size, open headphone can. But for this type of headphone (small, sealed, portable) they are remarkable."
Tyll also reported lower impedance and higher voltage efficiency to assist with portability.
Edited by vaed - 3/10/12 at 5:08pm