Different... very different.
One thing for sure, the cable is the exact same cable as on my UM2's Same plug, etc. Minor differences in the Y and slider.
Of the 4 tips I've tried so far, the Shure (large) Olives are the only ones that work for me. This is the same as with the UM2 and SE535. The E4c uses the Shure (medium) Olives.
The bi-flange is nice, easy to insert and comfortable, but as with anything of this type, too much microphonics and not enough isolation.
The Comply, while comfortable, muffle it by sucking out all the highs.
Remember... with about 15-20 min. of play time with my test tracks, these may not have even begun to break-in... assuming that such break-in will yield much of a difference. So these impressions are from the very initial listening.
First (immediate) impression is that they are more pronounced on either extreme end than the SE535 (I'll keep any comparisons to these two unless there is a specific reason to discuss another IEM, as in the case of the cord, above).
The highs are, above a certain frequency, more apparent and crisp than the 535. I can imagine that with certain recordings I'll be able to hear tape hiss... that is the frequency type that is more pronounced. The extreme highs.
The bass is deeper and more pronounced. Bass appears fuller and 'richer'. Descriptions of 'warm' don't seem far off... at this point. More pronounced bass than the SE535. Not much clarity in all that bass, just more of it. Not muddy, just not really tight. I felt that way about the M50's until they broke-in. They tightened up and I'm hoping these will also.
The mids... ah, the mids. Right now, quite a mixed bag. Some frequencies seem about right, but overall the upper mids seem recessed.
Overall, what I seem to be hearing is in the shape of a W or a U with a bump in the middle. There seem to be two dips, one at 3k-6k, gradually climbing up to 13k or so. The other dip seems to be from about 1k to 300hz then back up to a well-pronounced hump at 30-90hz. Or... put another way, a strong U with a bump at 1k - 3k (or something like that).
The overall impression is good, but odd. Not immediately great. Recessed mids, especially upper mids. It gives a strangely muffled impression, but with big bass and a crisp upper end. Voices are recessed and slightly mutted.
I will refine these observations this weekend. These are rough and course and not terribly specific. Sorry 'bout that.
Realize, that's the way it sounds... now... no test tones here at work, and nothing scientific whatsoever in my testing. Just listening, and these are the impressions so far.
All files are lossless @ 24bit/48k or direct CD rip to lossless at 16 bit. Played HP out on 5th gen Nano or 6th gen Classic.
Psychoacoustics?? So in the time it took me to write this... Either I've gotten more 'used' to the sound signature, or the break-in has begun (which I don't doubt). Remember, I took these straight out of the pack, did fit tests and then started listening, so the initial notes played were right into my ears. And I thought, oh no... these are crap. But as the music played and I wrote my impressions, things changed somewhat are they are certainly not crap. How much 'not-crap' they are will be found out this weekend.
Thanks for your encouragement, recommendations and patience as I plod through these.
shane