These are hands down the most popular headphone in the world, that isn't beats anyway. It deserves it's own thread for anyone interested in this headphone, all information can be found in one place I've bought and sold this headphone so many timers. I've always sold it knowing it would return back into my collection. Review There's a review in my guide but I'm starting to see the benefits of reviewing a headphone after really long use. I've said it many times, this is a special headphone. It was made in 2003 and is still a flagship level headphone. When I see people buying flagship headphones like the T1 and Hifiman HE-560 it really amazes me that the HD650 isn't considered as it's hands down a better headphone than those. The LCD-2F & 3F are equal or inferior to the HD650 depending on the luck of the draw. This is amazing when you consider how old it is! The older LCD-2's I think was better than the HD650 because it had equal mids but better bass extension with similar resolution. Sound A gift from god. If god could come down and sing in your ear, you'd be freaked out and amazed at the same time..I get that a lot with the HD650. I don't get it all the time, my moods change like every other human. This headphone provides me with a lot of joyful moments. This headphone is very cohesive! most headphones I can pick them out in sections but the HD650, just like the LCD-2PF presents the music as a whole. Looking at graphs, you would see a lack of low bass, I don't get that feeling as much as other headphones because I'm getting a headphone that puts everything together and presents the music as one. When a singer is has their guitar, and sings, you get this sense of intimacy, a voice sounds real, engaging. Nothing sounds like it's forced or false. When a string is flicked, you get this realistic decay that again, I could only name a handful of headphones replicate well. Now I love my Nighthawk, a lot! but when switching between vocalist, you get the Nighthawks tone injected in your ear to the point it's coloured, like I can separate one singer from another as I'm listening to the Hawks. When I listen to the HD650, they adapt to the different tone of a voice better than the Hawks. I was blown away by the Nighthawk, but as time as gone on I've found it's faults. The bass, warmth overtook me. Everything I've said positive about it still stands! but the way it portrays the human voice isn't correct. If you look at a HD650 graph you won't find one peak, it's so smooth. You know what?! who cares about the tech talk, this headphone is amazing on emotion alone! I've recently found the Chord Mojo, without an amp pairs really well with the HD650. I call it my lazy boy set up and it's fantastic. By the way have you heard of the Sennheiser HD650 veil? yeah it's BS. Treble is great, present, smooth a little rolled off right at the top. Soundstage? Cohesive, good width and depth. Imaging? yes. It does what a top level headphone should do. Build quality? for god sake you ask too many questions! yes it's built so well and it's modular. Cables? please stop...yes good. How does it compare to the Q701? It destroys them How does it compare to the HE-400i? it wins here too. HE-500? Equals, I think they both do everything brilliant but the HE-500 has better treble detail and better bass texture. HD650 has better mids, micro detail and resolution. What sounds better than the HD650? Emotionally, nothing except neck and neck with the LCD-2PF. Technically I'd have to say some of the top headphones like the HE-1000, HE90, HD800(This actually a closer battle than you think) LCD-3PF and some of the Stax(hate the tonality of the SR009) On lower end gear, the AKG K712, Annie, HE-400i, Nighthawk could be considered better headphones and I reviewed them as such as not everyone wants to build a big system for the HD650. So that's my review thing... So thinking about the HD650? any concerns? ask away and let's talk 650!