Because the Stellaris are not part of the positive online and social media group-think, let me just say these are tremendous, *especially* at that price. I am not a Moondrop fanboy by any means-it just is so very "full frequency-response" sounding. It does not have the "wow" effect of some IEM's soundstage (much less good open headphones), or super holographic representation, but sounds darn nice. I have a few following caveats, but do absolutely love them so far.
Cons:
-need more power; not too much, but more than the usual balanced armature IEM
-need precise fit-*all* IEMs do, but these are not forgiving and will sound *bad* if not fit well
-the new silicon tips are very unique sounding, but on my experience, hype bass, upper mids, and highs-it will make the Stellaris more challenging for some listeners sensitive to treble. I can use them but am not treble sensitive-still, some albums sounded a bit too much. I am currently using Spiral Dot++ (ML in my case) which cleans up everything and makes it sound extremely "hifi" and excellent sounding. It does sound good and "normal" with the stock, clear silicon tips, but some recordings are not as forgiving as others. Consider the silicon stock tips as a "tone enhancer" you may or not need (I haven't tried the foam tips as I never use them, of any type or brand.) Not "bad", but do affect the tone of anything they go into (I tried them in other IEMs, and they are not subtle in the way they alter the sound.)
Positives-very natural everywhere, forget the frequency response analysis of some. There are no big spikes everywhere, and the mids to upper mids climb is not far off from many well known IEMs. The upper treble emphasis is excellent, and its most loved quality by this "broken ears" listener, as many pro audiophiles would likely describe me.
In short, with this product, Moondrop falls victim to itself, by generally adhering to a well accepted curve in most of their products, and being punished when they do something even slightly different (because really, it sounds "standard" to me vs many other brands' tunings!) The planar driver gives great, great, extended lows that are never muddy, crystal clear highs, and doesn't over do it with an overly high 8k to 10k over emphasis as many treble happy IEMs and headphones tend to do (I do like that emphasis but recognize it is much more offensive to most ears than the brilliance region the Stellaris emphasize.)
It is definitely a "no" if you know you hate extended treble response. I crave it, and it is especially well done in the Stellaris, as nothing sounds truly thin (compare it to, say, the Ikko OH-1S which I have and like, but do not use much-IMHO, the Stellaris treble is better extended and much more pleasing to "most"; the Ikko has decent bass, Stellaris extends much better, is cleaner, but also super deep.)
I have and love DT990s-please do not think the Stellaris are that in IEM form. *Very* different treble presentation. I frankly am quite positively impressed by these affordable IEMs.
Weight is fine-they won't fall off, and you do not feel them much once fit well. Do feel heavy on the hand, but not on-ears. People likely feel the weight on their hands and let that influence their reactions on-ear. IME it is zero-trouble. Great fit and isolation.
The stock silicon tips are less forgiving of fit. They tend towards brightness, but still have a very powerful bass presence. If it sounds like "needle upper mids", bad bass, and bad treble extension, they are not fitting well. Seems like a good material, but quirky. Once the intended fit for your ears is reached, it will sound good, though the Spiral Dot++, IME, offer a more refined, beautiful sound-along an easier fit.
Classical is too good, every violin detail is superb during pianissimos. One can see the soloist playing in front of the microphone. Truly amazing. The airy extension is "killer".
Great cymbals, though I am sure many of you are wary of these sounds. I hate recessed cymbals. We can be different, no?
And just $109.99-the icing on the cake.
Included cable seems fine-I have good cables that do change the tone, but sometimes a change is not always good. Yes, for IEMs it often matters. I prefer to stick to this cable, because I feel my balanced cable may bring too much of a bassy response. I prefer this "clean" approach, and I think the cable they chose is more than good enough (aesthetically pleasing as well, if a bit simple vs the premium cables.) The bass it has is already excellent, so a "bass enhancing" cable is likely not needed-at least for what I like.
A "better" IEM all-rounder will probably have less bass and treble extension, and a slightly milder upper-mids climb. But I have many, many of those "reference" IEMs and headphones. Allow me to disagree with the current group-think: I feel the Moondrop Stellaris are excellent, and am happy with the gamble I took in purchasing them without any previous listening experience.
Each to their own-agreeing to disagree is always a good thing. Happy music listening to all.