I received mine as well. Here's a couple of photos (just a snap with a smartphone) and some random initial impressions. A proper review will require much more time, so I hope to get it out next week.
Packaging
Quite standard, nothing premium but not cheap, either. In the package, there are:
* The earphones
* Three sets of silicone tips (S, M, L). According to the card found in the box, there should be one more pair of foam tips. It was not there.
* Shirt clip
* A small cloth pouch, roughly 8x8 cm
Sound
Mostly based on listening to Mahler's first symphony:
https://www.deezer.com/album/103082232
The sound is slightly tip-dependent. I get a good fit and seal using the M sized tips, but I prefer to use my custom tips anyway (from Custom Art). With the stock tips, the height extension is lacking a bit. With the custom tips, it's okay. With custom tips, the earphones sit farther from the eardrum; the difference could be 1cm perhaps. Fit is personal anyway, so I'm not going to spend more time on it.
My first feeling about the sound is that it's pleasantly effortless. Whatever I throw at it, it sounds like it's no big deal. There's excellent clarity in low volumes. I have Mahler's first symphony playing right now, and it starts with a quiet passage when different instruments sort of "whisper" to each other. Particularly the brasses are supposed to sound like we hear them from a distance and I get precisely this feeling.
The sound is very coherent. The coherence can probably be mainly attributed to the single dynamic driver, but also the relatively linear frequency response. Speaking of which, let's review the tonality.
Heights:
* Extended to the limit of my hearing with the custom tips, slightly rolled off with the stock tips.
* Good detail retrieval. More details than, for example, in Etymotic HF5 (single BA for $130).
* Even with the stock tips, the extension is much better than with Massdrop Noble X (dual-BA for $250).
* I can't hear any significant spikes.
* The heights are not emphasized.
Mids:
* The mids/highs transition is perfectly linear.
* I think the mids are the dominant frequency.
* Decent details.
* It could be the recording I'm listening to at the moment, but the upper mids have the most emphasis (violins, oboe, flute).
Bass:
* For me, the bass is the weakest part of the frequency response.
* Well extended. Better than, for example, Massdrop Noble X (dual-BA for $250). Double basses are well audible.
* Sounds natural and effortless, but I could definitely use more quantity. Tympani in an orchestra, for example, lack the impact we're used to from listening to live music. Ditto violoncellos.
* Increasing volume to get better bass response renders the upper mids or lower highs a bit piercing.
* Sub-bass sounds better than mid-bass.
* Even with the (IMO) subdued bass, it's still much, much better than Etymotic HF5 (single BA for $130).
* Mid bass or upper bass is probably better on the Noble X, thanks to the quantity. It sounds more natural on HE100, though.
* To be fair, when listening to Dire Straits' Sultans of Swing, I find the bass quantity adequate.
Soundstage:
* Pretty good. My primary earphones are IMR R1 (roughly $700) which is whole different league, but the HE100's soundstage is good.
* Much better than the Etymotic HF5 or Noble X.
Separation:
* Pretty good. Again, no comparison to the IMR R1, but much better than the Etymotics, for example.
* When listening to the Mahler, I have no problem in separating various instruments.
Cable
The cable is very thin, and the lower part is wrapped in cloth (see the pictures). It has a bit of memory effect but fortunately only a bit Unfortunately, there's quite a lot of microphonics. Wearing the cable over-ears mostly fixes that, but then we can't use the mike as it's right below the right ear. I've used significantly better cables (e.g., the Noble cable that came with the Noble X) and significantly worse cables (e.g., the abomination that comes with IMR R1). At this price point, I'd judge the HE100 cable as above average.
Let's see what happens after some burn-in.