Pros: Good sound stage despite closed design; very detailed; good bass with tight grip; extremely comfortable even when wearing glasses; fair price
Cons: No replacable/plugable cable; require amp; a little low in the mids
I've spent most of my life with open type cans. A year ago, after moving into an apartment, we decided to make some changes which necessitated me to get closed headphones. This way I would not disturb my wife and vice versa, I wouldn't be disturbed by the noise of others.
For various reasons - price being one of them (no more than $200) - I chose the Beyerdynamic DT 770 Pro 250 Ohm.
Audio setup: CD collection ripped to flac -> Gmusicbrowser / ALSA on Linux using a bitperfect configuration -> Asus Xonar Essence STX sound card with integrated headphone amp -> DT770 (using the cards headphone amp output)
The first impression is that they are extremely comfortable to wear, even for someone with glasses. I can sit and enjoy music or movies for hours and hours without the headphones bothering me. These are definitely the most comfortable cans I ever wore. Another bonus of the spacious over-the-ear design is that they always sit properly and don't block high frequencies etc., something I noticed when comparing them to the AKG K 142 HD on-ear headphones which require careful positioning else the highs get blocked.
Soundwise the DT 770 Pro aren't flat - both bass and treble are a little enhanced, and the midrange a little recessed. This usually doesn't bother me, as the headphones are very musical. No matter what I play, the DT 770 reproduce the music, and not just a summary of sounds. Complex passages of classical music are clearly resolved with no effort. The sound stage is quite wide, considering the closed design.
Ella Fitzgerald and Louis Armstrong come alive on Gershwins "Porgy & Bess" recording. Rachelle Ferrell on "First Instrument" is powerful and detailed. Montserrat Caballe's "Puccini Arias" are a joy to listen to.
With modern music the DT 770 are capable of delivering a nice punch in the bass and sweet highs without sounding harsh, even at concert volume levels.
Jazz tracks such as Lew Tabackins "Tenority" are played with authority, so is Miles Davis "Kind of Blue" (the remastered "Gold" CD).
Is the DT 770 Pro perfect? No! It's recessed mids are clearly noticeable. But the DT 770 has a musical signature that makes it worth auditioning.
I'm also using the DT 770 in my home theatre where it's driven by an Audiolab 8000A. The closed design and great audio quality lets me immerse into the movies, without getting on the nerves of my neighbours.
Would I recommend the DT 770 Pro 250 Ohm? For use in a system with a headphone amp - yes!