Bought UM3X two days, now I will compare it based on my memory to my over 400hrs IE8 which it is gone now. I am using iphone 1 st gen to compare with and no amp or any eq
Starting from Low end
IE8: deep and quantity wise,prominent and strong point for IE8
UM3X: very dependent on which tips I am using. Currently, I have shure soft flex, sony hybird tips(with little mod, it fits perfectly) and Tri flange tips( not trimmed), sorry about no comply will be mentioned. With Soft flex and Sony hybird, light and quantity is behind IE8. With Tri Flange tips, it turns sound signature become warmer, the low end beome fuller and down deeper which is enough for several singers, but is still lagging behind IE8 which manage to reproduce masculine voice. Great example is Micheal Buble, IE8 trumps in reproducing his voice.
Mid end
IE8 : Recessed /Laid back, not consistent with prominent IE8 Low end, always feel slump down and little bit flooded by bass
UM3X: Again, it is about the tips I choose. With Soft flex or hybird tips, it is clear,transparent and up front presentation, totally different from IE8. The way it put the vocal ahead of other instrument is amazing, bass is not interfering at any of mid range. Thought presenting vocal any closer than that is going to choke me. Which arise my curiosity to know how it compares with "Mid King" SE 530 as its well known "in your face" presentation. The interesting thing for UM3X here is that it reprdoduces mid range in different way with Tri Fange tips, or I should say it is for all spectrum, now it is like moving vocal from row 2 to row 4 in a cinema which it sounds more like IE8(row 6). Overall, winner is UM3X in this part
High End
IE8, Sparkly, detailed, some times a little harsh, most of time I am pleased with it.
UM3X. With soft flex or hybird, natural but not as detailed as Tri Flange. I trully believe why W3 and UM3X is claimed as different product in its marketing tactics, as from what I heard W3 has more sparkly high end and UM3X concur on its characteristic of flat response, high is accurate and detailed which is good at monitioring but for sure less fun and wow factor. IE 8 slightly win over in this part, but again, sometimes it is harsh as I said that before.
Bass
IE8: My hand down, even at the min setting, its quantity is enough.
UM3X: Really don't feel it is lacking of bass. With soft flex or hybird tips, light ,tight, controlled and quality wise bass, while quantity is really not that much. With Tri flange tips, I don't know is that becasue of the fact that it can reach my ear canal deeper or it is supposed to be like that with these tips, I really feel more impact, quatity is elevated up to a level which is closer to IE8 now, lets say it is having almost 75% of IE 8 bass at the min setting( Don't even brother a flame war to me at this point, thanks
). Don't get me wrong, if you are not bass head, IE8 bass sometimes is overpowering and intrudes all spectrum .
Soundstage
IE8, spacious , wide and not much height.
UM3X: Pretty narrow/average with Soft flex or hybird. Open up a lot with tri flange tips, which now is very very decent to give enough space to reveal instrument placement. Width is still not comparable to IE8 though. I am not so sure why I feel UM3X has height to a certain extent. I have to listen more tracks to confirm that. Don't want to mislead you guys, you can ignore this comment for now. Winner is IE8, but UM3X is competing nicely in this area, not that it could match in term of sapcious feeling, it is the feeling I am being surrounded by music which IE8 gives me too makes me very happy
Instrument reporduction
UM3X rules this time.Timbre and airiness of guitar is like a bliss
Instrument seperation
Again, no room in comparsion. UM3X win out easily.
Overall detailness
Same as above. I can easily sort out slightest detail which I barely find out in IE8.
Isolation
UM3X. Better than IE8 a loooooot.
Fitting
Tied. Both are very comfortable.
Hiss
For me, I hear hiss in either of them
UM3X responses to different tips well which makes me feel if you like to use soft flex or hybird, UM3X is totally different from IE8. It is brigther than IE8 a lot, more transparent and up front. As a matter of fact, I am not suprised each attract different buyers which prefer different sound signature. However, with tri flange tips, UM3X to me become refined/ different version of IE 8, less dark, more airy, better mid range and better consistency to all spectrum. It also gives me the same feeling of being surrounded by music which is one of reason I am fond of IE8 at the first place. The down side for UM3X with tri flange on is that it gives away a little bit shrill of treble/ high and deep low end. That is why I said it is different version or refined version
For me, I can not decide which one is better. I am impressed what UM3X can offer, it is like I got two decent different earbud on hand with different tips on, each of them is not good for all singers though.
Now I have to change tips when I changes my tracks too.
P.S. IE8 responses differently with different tips too,the only difference is that it performing badly with wrong tips on