Note: I wrote this originally for head-fi.org so if i reference "this site" im not talking about OT. I've been a semi-serious car audio competitor since 2000, both for SPL and SQ. I got into home audio about 2 years ago when I built a couple of tower speakers / crossovers with some audax aerogels. I since have upgraded, and now in my 10'x13' bedroom i have a 13 cubic foot ported sub box for an 18" adire audio maelstrom (tuned to 19hz). Nonetheless, enough with some qualifications. I'd like to think I have an ear for audio, though I probably burnt them out with my SPL competitions. I purchased a pair of DT 660's after reading as much as I could on this site. I wanted something with low impedance because I would like to be able to plug right into a laptop / portable player without having to use something in between. I also wanted closed phones because, well... I just prefer a closed phone. I'm anti-social or private or just weird. I stay up late at night and the sound insulation in this house is pretty lousy. Originally I thought about spending like 70 bucks. My friend broke my sony V6's (yea i know... weird sounding cans) and I'm cheap. I didn't want to spend much money but I wanted to get new cans. I looked at the senn 280s but I heard they broke fairly easy. I then started looking around and finally, after reading as many reviews as possible, decided on the dt250s (80 ohm). I was concerned about the ohmage though and I wasn't sure if they made them anymore. A day later I saw the dt 660s and figured they were for me. Never mind i had spent close to 200 bucks where I wanted to spend 70... Ok enough blabbering. My thoughts: Comfort: These are fairly tight-fitting headphones. If you have a pet peeve about that, or have a big head like me, this is important to consider. Its not an uncomfortable pressure, its just pressure. Weight: They don't seem that heavy. I dunno really. I don't notice them on or off. Again, relative to my heavy head the weight may just be insignificant. Construction: I hope these things don't break. Somebody suggested loosening the screws - are you referring to on the top where it segue's into the black cushion? Nonetheless they seem to be built "ok." The hinges are solid all around, they seem durable even when fully extended, etc. The cord is non-coiled, its just one long rope of wire. The connector is a 1/8" with a 1/4" adapter that screws on (kinda neat. i like.) Staging: I don't really feel like the staging is all that impressive. I never have in nearly any system i've ever heard. Either I am extremely skeptical of everything or I just simply have a discerning ear. Nonetheless, the placement from left to right seems decent and the ability for images to sound distant is there, but I just don't feel like I'm listening to something in FRONT of me. Further, its not like I could tell you honestly they sound like they are at the proper height. I have no idea whether they're supposed to be at eye level versus at ear level versus on the floor. Stage height is undefined. Like I said though, I am very critical of staging usually. Width of the stage is average. Personally, I think this is a good thing. Abnormally wide stages are not proper in my opinion. Detail: These are painfully detailed. Literally, it may have to do with the excessive treble, but no nuance slips by these things. Its annoying to hear some of the little underlying noises. I think this is a combination of decent isolation and flat frequency response in the midrange (so that certain noises aren't sublimated by an overkill of 3khz, for example). Isolation: Decent. I can still hear my cpu fans for example. Definitely blocks out a fair amount of noise though. If you're looking for a set of phones with no isolation you shouldn't be looking at closed phones. If you're looking for a set with killer isolation, these probably are 'satisfactory' but they're not overkill. Bass: Lean, with a mellow peak around 40-44hz. They definitely play low enough to satisfy, but they don't pound your ears into submission and make you scream uncle. What can I say, I used to compete in the SPL arena and i have a ported 18" sub in my bedroom. I'm happy with these phones though as far as the bass goes. Midrange: Very very very clean. They aren't warm, but they aren't really cold either. Neutral would be the way I'd describe them. I get the impression the frequency response is very flat for the midrange. Its nice. Treble: Bright! I'm so used to silk-dome tweets with off-axis responses that this was a little shocking at first. I am adapting slowly but still, these are bright phones. I don't know if they're the brightest out there, but i can wager they would rank on the "bright" side of things. For what its worth, this would be my only gripe. I feel like maybe I should be EQing them. Conclusion: What can I say that hasn't been said already? These are good headphones. Enjoyable to listen to all around. I would give them a 8.5/10 for a bottom line. (factoring price in). If you need the distinguishing factors the dt 660 offers such as the closed-phone, low impedance, durable nature - look no further. A final word: I'd post the music I tested it with, but suffice it to say this review is already pretty long. I am an avid electronic music fan, but I listened to some hip-hop, some bass test tracks, some classic rock, some modern rock, some blues, a little jazz, etc. I didn't really try them out with country music. I wouldn't say these headphones are geared for any musical genre in particular (despite what i read) except to say that if you like your hip-hop bassy, these may not have enough impact for you.