hifichris said:

  The "problem" is just that the E4c is a pretty neutral in-ear whereas the IE 800 is obviously v-shaped and therefore has got a totally different sound signature one either likes and can get used to or not. That's it.

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I am sure this would be the case. 
 
ie800 has it's own sound, and when driven by a poor source, can sound really nonimpressive. 
 
Well, ie800 is impressive from anything, for me, but E4c has just that sound of it's own, ie800 will surely sound really colored after it. But I love ie800 for that color, that is why I bought it XD. 

hifichris said:

  The "problem" is just that the E4c is a pretty neutral in-ear whereas the IE 800 is obviously v-shaped and therefore has got a totally different sound signature one either likes and can get used to or not. That's it.

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Yeah, different taste. I like neutral sound like HD600, I also like IE800. When I listen to 600, I miss 800's sound. When I listen to 800, I miss 600's sound. 

Grab a Mojo, plug em both in and listen at the same time! Put an amp in the line for one to volume match

caruryn said:

  It is warm,natural,smooth,nothing edgy or bitey on the treble,very good transient response,coherent and liquid sounding,intimate soundstage with good depth although a bit closed in if you compare to more expensive daps,bass is tight and detailed but i found it a bit too polite,not for bassheads,very good clarity and detail overall.Certainly an upgrade from the likes of fiio x5/dx90 and has plenty of power for headfones.That liquid and smooth tonality matches very well with the trebly and airy ie800,my 2 day impression of it.

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I wanted to avoid answering this but I have too XD. 
 
I want edgy sound, I want treble to bite and spark and be glossy and want bass to be very very tight and dislike smooth signatures and dislike warm and natural signatures... I also dislike intimate soundstage, I need soundstage to be as extensive as it's humanly possible... 
 
Mojo seems like it would be perfect for almost anyone, but exactly not me 
 
I just need my sound to be tight, mids to be sweet and colored, bass to be very very strong but very precise and tight and treble to spark and glare... And soundstage to be as large as possible, separation between instruments as good as possible and transients to be crazy precise and sound dynamic, dynamic range to be as dynamic as possible. 
 
The least thing I wanted is to have is a smooth signature like that everyone describes mojo has. 
 
(at least right now, in this exact moment in time, and with the music i'm enjoying right now ) 
(It seems that many people get ie800 without wanting it;s signature or because their source combines well to create a neutralish signature, where I love ie800 to bits, and want even more of this crazy signature, not to make it flat)

dobrescu george said:

   
I wanted to avoid answering this but I have too XD. 
 
I want edgy sound, I want treble to bite and spark and be glossy and want bass to be very very tight and dislike smooth signatures and dislike warm and natural signatures... I also dislike intimate soundstage, I need soundstage to be as extensive as it's humanly possible... 
 
Mojo seems like it would be perfect for almost anyone, but exactly not me 

 
I just need my sound to be tight, mids to be sweet and colored, bass to be very very strong but very precise and tight and treble to spark and glare... And soundstage to be as large as possible, separation between instruments as good as possible and transients to be crazy precise and sound dynamic, dynamic range to be as dynamic as possible. 
 
The least thing I wanted is to have is a smooth signature like that everyone describes mojo has. 
 
(at least right now, in this exact moment in time, and with the music i'm enjoying right now 

) 
(It seems that many people get ie800 without wanting it;s signature or because their source combines well to create a neutralish signature, where I love ie800 to bits, and want even more of this crazy signature, not to make it flat)

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Yes,not for you then,mojo sound signature may be too polite for some even though most like the liquid and non fatiguing tone.You should try Cayin N6 especially if you find used,one of the best daps in upper mid category and has all the things you listed.Big soundstage,excellent clarity,edgy but non fatiguing treble with good texture,rich and tight bass but it is on the analytical side and has neutral/ bright tone.If money is no issue go for Qp1R (i would if not for the damn scrollwheel).

okkultus said:

Yes, but - according to quite a few people -  the mids are recessed and the treble is thin sounding.

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that's true the treble is extremely thin and strange sounding

deftone said:

that's true the treble is extremely thin and strange sounding

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It depends on what songs, what equipment you are using. 
 
Using a Fiio X5ii here, with a multitude of bands, the treble is amazingly good. almost perfect. There is nothing to fault on treble. And mids are magical. Ie800 is not mid forward, that's a given, but one would have to search through many other IEMs to find these magical mids, which are very sweet sounding. 
 
ie800 is not overally sensitive to being paired with specific other equipment, but maybe some DAPs and sources make them sound like that. 
 
There's also the fit problem, ie800 without a perfect fit will sound thin and lose it's amazing sound. 

I have to disagree, I couldn't get them to sound good with any music or source not even moJo, the coherency is horrendous on ie800, once I experienced true "audiophile" sq I couldn't go back to ie800s they felt like an expensive joke.
But hey we all hear things differently and that's what's great about the hobby.I'm glad someone enjoys them it's quite a polarising IEM like the flare r2pro.

The best headphones I've heard regardless of price are the hd650. And iems would be the p1.

deftone said:

I have to disagree, I couldn't get them to sound good with any music or source not even moJo, the coherency is horrendous on ie800, once I experienced true "audiophile" sq I couldn't go back to ie800s they felt like an expensive joke.
But hey we all hear things differently and that's what's great about the hobby.I'm glad someone enjoys them it's quite a polarising IEM like the flare r2pro.

The best headphones I've heard regardless of price are the hd650. And iems would be the p1.

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What s p1? 
 
Hd650 are great in mids, but way too smooth in treble for this pair of ears and for this set of music.

dobrescu george said:

   
What s p1? 
 
Hd650 are great in mids, but way too smooth in treble for this pair of ears and for this set of music.

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Check his sig 
 
MEE Audio Pinnacle P1 - one of the best $200 IEMs released this year IMO.

dobrescu george said:

What s p1? 

Hd650 are great in mids, but way too smooth in treble for this pair of ears and for this set of music.

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Agreed, dull and unexciting. If you listen to live bands, hear cymbals close up, the ie800 gives an accurate portrayal to me. Seems these days, many people prefer a safe softer approach, rather than live sound.

andrewh13 said:

Agreed, dull and unexciting. If you listen to live bands, hear cymbals close up, the ie800 gives an accurate portrayal to me. Seems these days, many people prefer a safe softer approach, rather than live sound.

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agreed too much extension is fatiguing

brooko said:

   
Check his sig 

 
MEE Audio Pinnacle P1 - one of the best $200 IEMs released this year IMO.

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Thank you for pointing that out! 
 
I still would have a fear that P1 is rolled off and smooth, which is exactly not the sound I'm looking for!
 
But that difuser looks like P1 could do some interesting things for sound. 
 

andrewh13 said:

Agreed, dull and unexciting. If you listen to live bands, hear cymbals close up, the ie800 gives an accurate portrayal to me. Seems these days, many people prefer a safe softer approach, rather than live sound.

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That's the part where I'm lost. Why would anyone not want the live, sweet, juicy, energizing, vibing sound of the live cymbals and prefer the dull approach>? 
 
I cannot even listen to jazz without the cymbal bite, it's just not that engaging, the music is lifeless without the cymbals being there.
 
(It might be a problem of having been to too many live concerts, and practicing with bands, and having a great time there, thus mind is interpreting that as good music, and recorded music reproduced through smooth equipment.)
 
I mean, HD650: The mids are great, clarity/resolution is great, bass is great. Treble is a complete let down, it's like everything one can listen to sounds polite. 
 

audio123 said:

agreed too much extension is fatiguing

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But that is the point, not everyone wants that. Some people love to have energizing treble, while others want a relaxing listening experience. 
 
I guess that it also has something to do with the mood of the music, as having stronger treble is welcome with more energic music by nature, while having smoother sound would actually be fit well with music that is in itself smoother. 

Indeed we all hear things differently!
A friend of mine prefers Philips Fidelio X1 above SE846, ie800, HD700, HE400 - and that because to him X1 sounds much better (I disagree).
Senns HD700 are known for their good soundstage and clarity and It was sort of reference for me but then I got HifiMan HE-400 (very cheap and slightly modded) and was wondering if there is something wrong with my HD700 and even with me... HE-400 just sounded to me much more open (biggest soundstage I heard), more clear, more bass, more treble (more than ie800 and much more than HD700..more aggressive) butt the overall sound was not as natural as that of Senns or Shures.
Like two weeks ago I visited my parents (with two bottles of red wine) and asked them which IEM they liked more SE846 or ie800. My father said that he prefers ie800 without any doubts (he described it as clearer and more extended sound) but my mother said that SE846 sounds much better, more natural/real and personal. Interesting!
 
Also about ie800:  I noticed that if I switch fast (volume matched) from ie800 to another headphone, the other headphone sounded somewhat wrong/bad/too-thick/unrefined/congested (or just different) - and I am talking about full-sized like Denon D600, Fidelio X1 and even HD700. BUT - when I did that with HE-400 it was different. To me they are pretty similar (HE-400 and ie800) but HE-400 has even more treble and clarity, less bass but sounded a little bit artificial.

I'd say peaks and resonances in the treble are what cause treble fatigue, not extension. The UERR has good treble extension, but is non-fatiguing thanks to the way the treble isn't boosted, for example. 
 
When I switch from an iem like the andromeda to the ie800, the ie800 feels a lot less fatiguing. It's like a relief to my ears. That's not saying it's better, per se, just that there is a lot less treble fatigue going on. I actually like the andromeda a lot and am looking forward to what Campfire audio brings out next.