If you like to gamble then I’d recommend the Urbanfun YBF… The Quality control is shit tho. I was lucky and got a well put together beryllium unit.
Acoustune HS1657cu is one I have seriously considered in the past as i loved the HS1551cu. Inoffensive DD with a special Myrinx diaphragm. Amazing timbre!
im all about finding a solid DD, ive read about the Urbanfun before just got lost in all the rest lol.
Just keep on mind YBF is an actual roulette, you never know what r u going to buy…
interesting, looks like Zen or Illumination then
right on, ya im seeing the quality variance
It really depends on what you are sensitive to.
For me, I am most senstive to peaks at the 3,5k area. And the Zen isnt a problem for me, but it is an intense iem for sure.
However, if you are less sensitive to that area than I am. Then the Zen could actually be dark, since the upper-treble is rolled-off quite a lot.
With the Oxygen, its peakiness for me at least, is because of the upper-treble, it has quite a lot of it. Literally the opposite of the Zen.
The FD5 on the other hand, is more even between the lower and upper treble so it doesnt sound like a particular area is extra peaky. The extra bass quantity it has over the Zen/Oxygen of course helps its overall tonal balance. Thats why for me, the Oxygen is the brightest and most fatiguing out of those 3.
With the FD5 and Zen, they are somewhat more even in terms of brightness and fatigue.
Im really not sure which frequencies it hit me at but it felt like DT770 250 peaks, like a really sharp Q resonance on some tracks mostly electronic, i was just shuffling so i was getting into everything. Ill have to look at a graph of it compared to my FH3 and Legacy 3, I do really like the resolution though over the FH3, but man it hurt, and im somewhat of a loud listener, especially with Techno/Bass Music
Oh, yeah. Listening volume will definitely affect the treble (and the bass), since you will perceive more of it at higher volumes.
Tips also changes the sound so maybe try some other tips as well. Final type e are well known to reduce treble peaks.
Right on thank you, i tried the Fiio tips and my Spinfits which i like on the L3’s, will have to get some Finals
Indeed, get a good tip collection first before you even consider moving up above the fd5 range.
They are super important. You can check my database for my tip comparisons.
And also this one: Tweaking Tips - A Simplified Guide To IEM Silicone Eartips UPDATED 2021-03-2 • Audio Reviews
Awesome thank you
np, I would say that having a good tip collection is mandatory if you are considering/have iems over 100 usd.
For reducing treble, I would recommend as I mentioned above, the Final Audio Type E tips. But if you want to take it a step further with the treble reduction, the Sony EP-TC50 (foam/silicone) works even better in that regard. Although I much prefer the Type E´s though.
Like you, I share the same sensitivity. After experimenting with some tangible upgrades to the FD5 (RHA filter, high purity copper cable and my preferred tips), I completed the fine tuning with my Qudelix-5K PEQ. The end result is good enough that I’ve curtailed my IEM purchasing for the remainder of the year.
I was contemplating the Dunu Zen, but for that amount of money, I don’t want an IEM that is just slightly different to the FD5. The Fiio FH5s might catch my attention; but I’ll wait for you and a few others to test it out first.
Hahaha, you already assuming I will get it? 
I wonder if FH5s will be worthy buy if one has FH7
Are there any info of what tuning they gonna have?
Nothing I know.
Would foams increase or decrease the treble thing?
Decrease, but also change the entire sound a lot. Silicones are the best for sound.
Aye foams suck sonically 