I wonder how they got this headphone to get planar speed etc, like it genuinely sounds like a planar driver. I’m guessing it’s the TPCD?
These headphones are significantly superior to planar magnetics in terms of “speed,” and this is immediately noticeable. I listened to them in a store using A/B switching against various Audeze and HiFiMAN planar models. The sound of headphones of this type often feels somewhat unnatural. It’s hard to describe, but there is a constant sense of discomfort during listening—you simply can’t fully relax and enjoy the music.
In addition to the usual harmonic distortion, there are many other issues: phase distortion, intermodulation, and so on. The planar magnetic driver is not really about speed at all; unfortunately, it is too large and temperamental. I also used to consider planar magnetics to be something advanced and technically superior to the “old” dynamic driver, but apparently we have all become victims of marketing and the popularity of certain models that delivered a merely “different” sound rather than genuine improvements aligned with the true philosophy of hi-fi sound authenticity.
Thanks to a diaphragm that is extremely light yet rigid, combining metal strength with a carbon membrane, these headphones produce a very natural sound, responding instantly to transients and stopping just as quickly. I highly recommend that everyone audition this model in an audio salon or any other accessible environment. For me, these headphones truly became the endgame in my search for better sound, as most headphone models merely alter tonal balance—brighter timbre, weaker or stronger bass.
Their sound is reminiscent of listening to very expensive studio monitors in a properly treated room. Of course, excluding the stereo image created by two speakers, it still sounds like headphones. However, everything else—texture, clarity, vocal and percussion naturalness, instrument separation, and overall transparency—is simply incredible. Perhaps electrostatic headphones sound similar.
Reddit user KamilScott posted a mini review and comparison of the Sennheiser HD 630 and the HEDDphone D1—his impressions are worth reading. The feeling the D1 delivers is comparable to the first time you heard music through truly high-quality headphones: “Oh my God, how transparent the sound is, how perfectly everything is audible—new, previously unheard nuances everywhere.”
P.S.I apologize for the clichéd expressions, but there is no other way to say it.