Just wanted to post an update regarding
Magaosi X3, that I ended up taking (I had asked in this group, but no-one had them at that time). I have been having the IEM for over a week now. Initial impressions were that it was very dark for my taste (reminded me of a poorly amped HD650, but with much better bass reproduction), but after some tips change and possibly "brain burn in", it has considerably improved.
First thing i found was, tips seems to drastically alter the sound. With my typically reliable jvc spiral dots, it really opens up the sound - especially in the upper mids and treble, but there is a significant roll-off in sub-bass and even some mid-bass. The best compromise fit for me was either Spinfit medium tips or spintfit dual blade (this was the first IEM where this tip worked for me). It isolated very very well with spintfit dual blade, which means I can keep lower volumes, however it is not as comfortable.
So, I'm sticking with spinfit medium tips (and will give symbio W tips a try) when they come.
The resulting sound signature is still slightly dark, in the sense that treble is not very airy, but is very smooth and easy to listen to. (pleae keep in mind, I mostly listen to my slightly EQ-ed HE560 at home, which some refer to having treble north of neutral).
Past couple of days, I have been listening to it, with a portable dac-amp (LHL Geekout V2+ in SE mode), and i should note that despite the IEM being pretty sensitive, there is no hiss. With Geekout V2+, the treble becomes even airier, soundstage becomes wider.
How it compares with Other IEMs, I have heard:
Magaosi K5, i think had a slightly larger soundstage, and has more lush vocals (being mid forward). However, X3 in my ears, seems to extend much better in bass, and slightly better in treble, while having neutral mids. Bass is very very fast (decay is very fast in general) compared to K5.
Based on my experience, I think I would rate it higher than MEE Pinnacle P1, Simgot EN700 Pro, Fidue A73 , Magaosi K5, RHA t10/t20i.
In terms of isolation, only Magaosi K5 which has a similar shape comes close. Very impressed so far.
I'm assuming Magaosi K5 is the same as some other brand name 5-BA's that i have seen on aliexpress, as they seem very similar, but not sure. Either ways, would be interesting to hear more impressions and comparisons, once more people get it.
A few pictures: