Specifications : Driver Unit 50 mm Frequency Response 10-28000 Hz Sensitivity 100 dB Impedance 32 Ohm Maximum Input Power 500 mW Cord length 2 m detachable 4-pin mini XLR OFC cable (3.5 mm) 990$ The Driver included in this headphone is made by Tymphany ( guidelines and basic specs provided by @Drakkard from Kennerton ) . Ref HPD-50N25PR00-32 : spec sheets here : http://www.tymphany.com/wp-content/uploads/2016/05/Headphone-Spec-Sheets.zip Brief Listening Impressions ( Updated 20161212) I Like this headphone so I could be maybe biased. Very nice Overall Balance , Open punchy lively sound with a good open soundstage . Somewhat forgiving for bad recordings but it does not fall into the limp dick laid back territory. Not as refined and resolving as best offers but very enjoyable for a wide range of music, including so so recordings. Maybe some weirdness in the mids but not offensive to my ears. The 1 khz emphasis shown in measurements does not bug me as much as it usually does. Mids are a bit too forward/shouty that I'd like though but not a dealbreaker to my ears. Definitely punchier and deeper bass than the HD6X0. Great headphone for Electronic music in my opinion. I honestly prefer the Vali to the Elear despite the fact the Focal is probably a "better" headphone. This headphones reminded me a bit my ZMF Vibro X but without the "T50RPish sound" ... That kind of punchy easy going sound signature. Headstage is kinda large and airy but still a bit forward. I still thinkg the Vali offers decent Layering and Imaging capabilties. Overally a very decent sounding headphone. I'd say it sits more into the "sit back and enjoy the music" kind of headphone but on the Lively/Punchy side. I think the sound itself does not justify the price tag but the whole package and overall quality worth it. One of the rare headphones I didn't immediately find massively overpriced. Comfort is so so due to the weight/clamp and design. it can be a dealbreaker for some. it's not for me and I could wear it for hours without pain or even discomfort. Need some time to find the right adjustement though. Loaner opened for friends in EU and US. Check the dedicated section. I highly encourage people to give it a listen. We have this pair to allow friends to discover it in good conditions.