about the sibiliance and sharpness:
Sub Focus - Out The Blue
in the Intro (until 0.44) every S she sings is very sharp and too pronounced, hurts a bit
i_o - warehouse use only
just anywhere in the song, the hihat(s) are also very sharp in the ear, too pronounced
And about the bass problem:
POLI, Lorenzo Raganzini - The Last Station (VII Circle Remix)
from 3:44, I just hear many sounds, but I can not feel anything from the bass anymore, by that I mean, its just one soup of sounds, not pronounced basskicks etc
but in
POLI , Lorenzo Raganzini - Raving in Paris
when there is only basskick (nearly most of the song), you can feel it better and its better pronounced, since there is nearly nothing else
same as in
ABYSSVM, Dolby D - Calopteryx
from the Drop @0.58 and forwards, yes there is bass, strong bass (in the track), but it is quite hard to separate the basskicks from the rest (for example, when im Djaying and have to queue it up with another track).
Milo Spykers - Zenith
from 1.00 and forwards, the bassline is strong, and you have only some "uncontrolled" wobble, but cant get really the single basskicks "isolated" in the bass region
with other IEMs (Custom Art Ei.xx, TFZ V90 for example) it is way easier to separate the basskicks, and you can even feel the single kicks way better, which makes djaying so much easier
edit1: maybe a crossover network would have helped, so the single drivers are not so busy for all freq, but im not an audio engineer
edit2: maybe its because the DD is too slow, not keeping up? Cause thats also I feeling I got
Thanks so much for taking the time to post this. Very helpful indeed. I've gone through track by track on Tidal, and made notes comparing the Aten and FH7. FWIW the FH7 is not a warm/dark IEM (neither is the Aren), but is generally immune to sibilance and has excellent treble resolution and extension.
Sub Focus - Out The Blue
Aten: Ouch! I know what you mean. Sibilance is quite prominent here. The recording seems highly compressed and very bright, not great quality at all.
FH7: Still a hint of sibilance, which to me says it's in the recording itself. Still very bright.
Notes: This is a really poor recording, very compressed. Probably not a great track on anything buy dark/rolled off IEMs/headphones, and dancefloor speakers.
i_o - warehouse use only
Aten: Heavily compressed (I can tell from the high volume compared to most of the music I listen to.) High hats are actually very good to my ears, clear and not too sharp.
FH7: High hats even more refined and detailed, but that's because the FH7 simply resolves more detail than the Aten. No sibilance or harshness here.
Notes: Nice, punchy track. Compressed but not a poor recording unlike the first track. I'm beginning to think you might be treble sensitive, or used to warmer IEMs/headphones that roll off some of the highs - which is probably very useful for this type of music.
POLI, Lorenzo Raganzini - The Last Station (VII Circle Remix)
Aten: Switched to YouTube because the Spotify version seems too heavily compressed. Can't say I hear any issues with the bass from 3:44 onwards. Yes there are other sounds in the mix but the bass is loud and clear, maybe not as thumpy as the previous track though.I suspect that's in the recording.
FH7: Bass is actually more pronounced and better quality, in this track, on the Aten.
Notes: Track not available on Tidal. Not sure what to say, bass is clear and kicks are very distinct.
POLI , Lorenzo Ragazzini - Raving in Paris
I see your point here, less congestion around the same bass freqs. But the bass is quite smoothed out, not a very sharp 'kick'. Same goes for both IEMs. Track not available on Tidal.
ABYSSVM, Dolby D - Calopteryx
Aten: Deep, thumping bass here. Again, can't say it's very hard to separate from the rest of the music. Very distinct. I can feel it in my chest with the Aten.
FH7: About the same level of separation as the Aten, which is to say, very good. Slightly sharper attack and faster decay with the FH7, but that's to be expected from a DD/BA hybrid.
Notes: very cool track again, found myself bobbing my head and tapping my feet. As for the sound, it's great, so much better than that opening bright and sibilant track.
Milo Spykers - Zenith
Aten: I hear what you're saying here. The bass is not as distinct as in previous tracks, but I feel that's in the recording. Bass is bloated, but that seems intentional.
FH7: This is definitely in the recording; the bass kicks are even less distinct with the FH7.
Notes: the way the bass is recorded/played here makes it difficult to pick out with IEMs that don't have a sharp V-shape freq response. Neither Aten or FH7 are a sharp V.
Overall comments:
Firstly thanks for introducing me to some cool tracks. This isn't my usual fare, but I'm really enjoying what I'm hearing. Secondly, it seems you're a DJ, or at least enjoy DJing? the Aten, which is a semi-open IEM, is probably the last IEM I would choose to DJ with, because too many external sounds will leak in and make the actual track difficult to monitor. Same goes for the FH7 which, while not open, is a shallow fit and therefore doesn't isolate particularly well. I'm not sure what your other IEMs are doing better as I've never heard them, but very possibly they are tuned in a more typical V-shape for 'fun' IEMs, and possibly also isolate alot better.
By the way my notes are not intended to discredit anything you say, and if anything they only go to show how we hear the same things differently. There's enough in here to suggest our experience is quite different, and since this is far more your type of music than mine, you'll probably also have very different expectations from IEMs and headphones than I would. Good luck with your search, and keep in mind what I said about isolation and sound signature.
PS. don't you think over ear monitoring headphones for EDM, like the V-Moda M-100, would be preferable to IEMs for all of the above?