so after one week some more impressions, especially in comparison to the IE300.
As I wrote before the IE900 is a better, more refinded IE300. In the beginning I thought I would be fine without EQ. That changed:
I think the IE900 is overdone in the treble. To a lesser degree than the IE300 but still it is too much in terms of sheer quantity. Don't get me wrong the treble is amazingly resolving but there is just too much of it. It is distracting in the sense that it stands out the most compared to the bass and mids. I need to bring it down by 2,5-5dB to integrate well with the rest. And there is still plenty of it after EQ.
I don't know what exactly it is but after 1h or so it is still a bit fatiguing.
The bass is a about as perfect as it gets for me. Zero complaints here. The upper mids are laidback, I'm surprised that it is not a problem. I tried EQ more upper mids but everytime I couldn't decide if I liked it better that way or not
This is an expensive set, I hoped that I don't need EQ. If I need to use EQ I also can EQ the IE300 some more. Remove some bloat, boost the mids a bit and it brings it closer to the IE900. Well the treble is still a bit better on the IE900. I'm not so sure there is a huge difference in technicalities between the EQed IE300 and IE900.
That leaves me a bit torn if it really is worth the price premium over the IE300.
Other than that I really enjoy that effortless, coherent and spacious (for an IEM) sound delivery. This made me actually abandon all my BA and hybrid sets and I'm becoming a fan of pure DD IEMs