I wish I could just plop the drivers from the HE-400 straight into the new headband of the new line of Hifimans...
The headband and cable connections were the biggest decider for me to return my HE-400. I still miss it, my favorite headphone ever in sound signature
I just returned my HE-400i (new cable broke in like a week...) for the HE-400S. The HE-400i was too warm and lush for me.
The headband was more comfortable, but I always have the issue of the headband getting too bent out of shape, and it changes my perception of Left and Right areas of sound in the soundstage. Drives me nuts. Happened with the DT990, HE-400, and even just bending the stress-holding band on the top of the HE-400i tended to affect how the drivers clamp onto your head, leading to a misaligned perception of sound for me. Unless the headband is perfect shape from out of the box, I can tell that one of the channels is too close, or too far. Too soft, or too loud. That's my biggest Audio OCD, and no one else seems to share it... considering moving to only headband suspension designs that cannot possibly be bent (such as the all plastic AKG headbands. Really considering the K7XX as a second headphone now that it is on sale). I just cannot give up that planar sound though.
Rant over.
Fingers crossed the HE-400S is more energetic than the HE-400i, that's what I want. Though, from all 50 pages of this thread, it seems only slightly more energetic than the HE-400i.
The 400i was far too closed and forward in terms of mids and soundstage. I want basically neutral, to maybe a slight bump in mids, with high treble extension (wish it had 560 treble).
Bass still seemed clear and heavy enough for me in the 400i, and I'm assuming the HE-400S only betters that. Don't really miss the bass of the HE-400, but I did appreciate it. Not really a basshead, but it's always a welcome addition for me. I listen to strictly genres of more modern rock and metal genres, and some bass is needed for most of those genres.
I want a dark headphone with energy, and nothing I've heard does that better than the HE-400 so far from all cans I've heard.
The HE-400i never wowed me like the HE-400 did every time I put them on.
I truly think the HE-560 is the perfect signature for me by the sound of it (a neutral headphone, with the influences of a V-shaped signature with its sub-bass and treble extension) but my bank account says no to me. Used 560's are going down, so maybe one day. HE-400S for me now, can't wait to hear them.
Hifiman says they're coming from china + 3-5 days processing once they get my He-400i... so they'll arrive like next month I fear...