Just recieved the 400i. Amazing. My first planar cans.
Decent planar bass, quick and controlled with no bloat at all, yet, he400i, fortunately for me, also remind me slightly of a planar version of the Grado sound.
These do have sparkle, which I hoped for. Distorted guitars have some texture to them that I've not heard on my other cans, aside from the Grados. This is what I hoped for. I find brighter cans with a refined and balanced sound much more engaging and interesting, usually, than bass heavy cans.
Also, this is my first time experiencing that often mentioned notion of cans good enough to reveal bad recordings. Wow I never some of my favorite tracks are slightly below par in recording quality.
I've considered for 2018 to get he400i, hd660s and LCD2C. And Schiit Jotunheim.
Now I'm considering getting Jotunheim first, and then begin renting headphones from thecablecompany.com.
I say this because:
1. I am a Grado fan. That kind of treble/mid-centric tuning is what I like, I'm on the lookout for cans that are not dark (unless it's Audeze) but cans that have some sparkle and bite and crispness to their sound.
2. The he400i is wonderful, beautiful and I even love how they feel, but the jump in sound quality, imo, from my little SHP9500s ($80) isn't that great. The bass is faster on he400i and soundstage has opened up a bit. But I'd rather now get a great amp/DAC and audition headphones through renting and see what really sounds like a massive step up in sound and then save up for that.
Anyway, the he400i sound great to me and I'm glad I chose them simply because with these I did not experience any kind overly bass-centric sound or any kind of bloat or bleed from the bass.
Build quality is good, a lot of plastic but that's good because they are light, no creakiness at all in the moving parts. For $190 new (Amazon) these were a great deal.
Very comfortable too, but my PSB's are more comfortable, the SHP9500's very comfortable gigantic over ear pads, and my Grados are weightless and disappear(only with the soft S-pads though).
Lol right now I'm still too geeked out about receiving the he400i, but in a few months when I'm used to having them around it will be a treat to reach for these and know I'll be hearing very good sound from my LG v30+ and he400i combined.