Summary: Sound is neutral and very clear. Much wider sound stage than other (cheap) headphones I've owned. Not too hard to drive; bass is lacking from iPod output, but my Creative X-Fi Elite Pro does a fine job. They have a 300 ohm impedance which means they need high amounts of voltage with low amounts of current. These are open back headphones which means sound easily leaks IN and OUT.
Pros: Clear Sound, Easy To Use, Powerful, Professional Functions, Versatile
Summary: As a long-time owner and lover of Grados (most recently the SR-225s for about 2 years), I was skeptical that these would impress me. I was wrong. I haven't touched the Grados since I got these. The balance is incredible. No, they don't have the almost magical guitar sounds as the Grados, but everything else is improved. Bass goes much deeper and has more punch, vocals sound amazing, and brass instruments?! Wow.
Pros: Clear Sound, Easy To Use, Powerful, Versatile
Summary: These are great headphones - neutral, smooth and easy on the ears for nearly all types of music. I've got a few sets of cans including the Audio Technica A900, Shure E2C and Future Sonics Atrio M8's. The new Senn's are easily my favorite, particularly after breaking in for a few days. Typical use is with a Zune 30gb, powered by a Little Dot MK1 portable amplifier.
Summary: I could go on and on about these phones, the umpteen reviews you read on this site indicate what you already suspect, these are phenomenal quality for the price. They are comfortable, sound fantastic, and have stood up to abuse by me and my two teen age sons. I got them on a whim, wanted some nice headphones to listen to classical and jazz music without disturbing my family.
Summary: Before the HD 600 I was used to use an AKG K240, wich is not a great headphone, but is at least a regular one. After listening to the HD 600 I thought that the AKG was something like a consumer headphone. Maybe it's not the "best sounding" headphone, but it is so precise that a good recording sounds good, and a bad recording sounds bad. It does not make anything better than it is.
Pros: Clear Sound, Easy To Use, Professional Functions
Summary: I've been wanting to buy a HD600 for many years because it seemed to be the benchmark for a lot of professional studio engineers and reviewers, not to mention budding audiophiles. But I hesitated because it's pretty expensive in Australia (A$600-700) and wasn't sure whether I wanted an Open headphone. Until recently I only had Closed ones including Sennheiser HD280pro. But I bought Koss KSC75 and Alessandro MS-1 (a tweaked Grado SR80) open headphones and liked the sound.
Summary: One of my greatest purchases ever!!! These really make me fall in love with the music I listen to. Normally I just plug them straight into my laptop headphone jack and they still sound great. They sound better and better every day and make everything else I listen to sound empty by comparison.
Summary: I bought these based on the reviews here, and paired them with a X-Can headphone amp, an Arcam CD-23 players, and McCormick pre-amp, pure silver sound interconnects. Initially, I was really disappointed. The sound was muffled. I purchased the Cardas replacement cable, which helped, and mounted the X-can amp on ceraballs, which also helped. But most of the improvement in sound came from just letting these break in for a several weeks.
Summary: Note: The price paid is used from Amazon Marketplace. Also, I've duplicated my review from the other product listing here on Head-Fi. If it is possible, the two HD 600 pages ought to be merged.
The first thing about these the HD 600 is the excellent tonal balance - it's never harsh, but the highs are still there and very detailed. Sometimes the finest details may get lost in very complex music thanks to being overshadowed by other parts of the music, but the...
Pros: Very detailed. Balanced. Good soundstage. Absolutely amazing mids. Entirely modular, with all parts replaceable.
Cons: Bass could be a little tighter. Some would say subdued treble, but I'd say it's at a very realistic level. Soundstaging has room for improvement.