Received my Noble X's! I want to post some early impressions, mainly compared to my Shure se215 (which I've used for 1-1,5 years with stock Shure Olive tips).
Bought these 2nd-hand and got some comply tips with them, which were the first tips I tried on.
Sound: A satisfying, pretty linear upgrade from my se215. Tonality isn't changed much but is more balanced, treble has slightly more air. Separation is better, soundstage feels deeper and maybe even a little wider.
Not a massive upgrade in resolution/detail, texture of voices, timbre etc. All in all I was neither impressed or dissapointed, just satisfied.
Then I switched the comply's out for the big, white/red silicone tips, and dayum:
Tonality is now more balanced, treble shines a lot more without even touching the border of harshness. Treble is airy, separation better. The biggest change was in detail, texture and overall perceived clarity, all a lot better.
It's a "safe" sound signature that is easy to listen to: Balanced with a warm tilt, satisfying bass, treble that comes through reasonably clearly and is never offending.
I'm pretty new to IEM's so don't really know what I can reasonably expect, but I'm happy with the sound I'm getting. Not mind-blowing like the iSine 20 was for me, but the X is really good compared to my se215 at least. For the price, I'm impressed.
On the comfort/ergonomics front, I was a big relief to put the X in my ears and feel how well they fit.
I was worried that the big shell (huge, compared to the Shure) and metal faceplate would make them feel bulky and heavy in my ears, but that's not the case at all. The inside of the shell is smooth and has a very ergonomic shape (for my ears at least) and they never feel bulky in my ears. The se215 actually feels heavier and more obtrusive in my ears, because of the thick, heavy stiff cable and memory-cable ear hook thing. The X's cable is super-light, flexible and thin which is great for comfort, but worries me a little about durability. Along with the lack of strain relief on the 3.5mm, I can't help feeling like the cable is rather fragile. Haven't seen any reports on them breaking though, so I'm probably just too used to the heavy-duty Shure cable. The cable is replacable anyway, so not really a big deal and IMO it's worth it for the gained comfort.
The comply tips are more comfortable to me, they go a little deeper inside my ear and feel very secure. Isolation is great too, just sucks that I don't love the sound from them (I had the same issue with the iSine).
The stock silicones are still comfortable and give a very good seal, but they don't go as far into the ear canal as I would like (I prefer a really deep fit, maybe I'm weird that way). They still stay in place very well though, used them for 2 hours straight when working out earlier today (normal bodybuilding stuff) and never had to adjust them. Isolation is still good enough, not really a big deal for me.
I have ordered some SpinFit tips in size Large, hopefully that's the right size (I use the biggest of the X's stock silicone tips). My hope is that the spinfits will give me the same sound as the stock silicones (or dare I hope even better?) and give a deeper, even more secure fit.