I see, well, just to clarify, the vocals on the UE 900 are still very good, right? Also, does the UE 900 have a sturdy build quality? Oh yeah, one more thing. Does the UE900 need an amp or benefit greatly from one? I usually go ampless on my cowon J3 and I wanted to make sure that it is sufficient
I tend to run everything off my iPod Touch (currently 5G, but all comparisons before were made with a 4G) without an amp. So it doesn't need one. I haven't tested it with an amp yet unfortunately. But you can go ampless for sure, it's pretty easy to drive.
Vocals are still good, but the W4 still does a better job of them. I'm comfortable with the build quality, everything seems pretty good.