Logitech UE 900

I'm also the one who had used Triple Fi. 10 before moving to this IEMs.

In short, this IEM's sound is so awesome in relation to their relative cheaper price with other IEMs in range if you can buy from the right place e.g. ebay. For me, I got this pair only for 199 USD from a seller in Hong Kong.

Now go on with the review:

Sound

1. High-mid
High-mid range sound of this IEM is the best of my listening experience ranging from full-size headphone (Sennheiser HD518) or other IEM (triple fi 10, audio technica ath-e70). It go deep and farthest.

2. Bass

Bass is OK for this IEM althrough not but if you demand for heavier. However, this IEM give a very clear bass without distortion in sound.

By the way, the must-need trick is that you have to use the right ear tips for your ear. Unfortunately, in my experience, non of the ear tips offered in the box can use my need and I had to buy from the aftermarket which is great. In the end, if you find the same issue, I may suggest that you might need to look for new ear tip.

3. Sound stage

As this IEM is a BA drivers based earphone, you can also expect them to deliver a good sound stage which this IEM will not let you down on this.

4. Built Quality

Built quality is a major issue with this IEM, I already replaced all of the cables offered in the box with aftermarket one. It certainly cannot be used for some specific activities; hard marathon and motorcycling (I did both ).

The body of the drivers are also easily scratched.

This is a review for the 900s (using an iBasso DX90)
 
My dear and beloved triple fi 10 died recently, after 6 years of intensive use and a fair amount of abuse, So well done UE, and thanks for the worthy investment. 
 
After looking at a dozen of potential candidates for replacement (Shure, even the UE Pro 5, Seneheiser IE80, etc,) I decided to have a go at the UE 900s thinking "if no good I will return them". Well they are definitely staying with me! This review is mainly a comparison with the Triple fi 10.
 
I read in a review, that the UE 900s were a more mature version of the Triple fi, and I think that is the perfect summary.
As listed in the Pros of this review, the UE900s are just .... better than the triple fi 10 in almost every respects (soundwise). And I really really liked, the triple fi 10: But the UE 900s are better and I would also add that they are as much fun to listen with! 
 
I started my IEM journey with the super fi 5 Pro (I am not a UE sales rep btw) and they were awesome but lacked bass and were sibilant to the point of becoming painful sometime.
Then I got the Triple fi 10 and this was honey to my ears! The bass was deep and rich and impactful and gone was most of the harshness in the high end (still some).
But when comparing the Triple fi 10 with the Super fi 5 Pro (still going strong after almost ... 10 years!!), I did realize that the mids were very recessed indeed. Also with some album/recordings the Triple fi 10 boosted bass was getting tiring to listen to and resulted in an unbalanced/artificial sound.
 
The UE 900s are much more balanced and fix those two downsides that the Triple fi has: The mids are more present and richer, and the bass is less prominent and at the same time more textured. This results in a significantly smoother and more fluid sound. There are two other areas where I find the UE 900s better: The soundstage is massively improved, and the layering of instrument is much better: I can more easily isolate individual instrumentsin the soundscape than I could with the Triple fi 10.
Because of the additional clarity I also find myself listening to music at lower volumes levels. 
 
Many reviews praise the accessories coming with the UE900s. Well I dont agree at all and think it is a very poor selection; The IEM come with tons of tips, ok, but no cleaning tool, not adapter, no attenuation plug (for use in planes), and a lousy and totally unpractical carry case, which design seems to be an after thought. For info the case of the triple fi 10 is absolutely bashed after so many years of use, but way way much better than anything I ever had earphone delivered with. 
 
Few other things I personally think could be better are 1) the cable: you get two ot them, ok nice thanks, but I will probably need both because the braided design seems very weak and will probably fail sooner rather than later. The cable also tangle A LOT. Not to mention that the remote does not work with Android devices (I am fed up with this apple/iPhone electronic dictatorship) although you can step to the next track by double clicking the middle button. The volume buttons cannot be used at all.
 
2) the swivel connectors make it difficult to manipulate and fit the earphones. I could fit the Triple fi 10 in the dark with one hand, walking in the crowd or in a shaking plane without problems. I sometime feel it is like a mission to fit the 900: untangle the cable, spot the right hand side unit (the little red ring does helps), rotate the connector and maintain it in place while fitting the earphones .... I will get better at it, but it is awkward.
 
Comfort wise, I had absolutely no problems with the triple fi. but the flush design of the 900 is better aesthetically. However there is more shell in contact with the ears' skin, which means more cleaning to do and possible more chance of having the odd pressure points. 
 
So in short, I am almost glad the Triple fi gave up on me. I did like them because I have been using them for so long but I think soundwise the UE900s are definitely a step in the right direction. I am very happy with the replacement especially now the price is so low (less than 190 UK£). To summarize the difference and If you like paraboles, soundwise the Triple fi 10 are a BMW, the 900s are closer to a Mercedes. Classier, more mature, smarter. and considering the glorious reputation of the Triple fi 10, UE/Logitech have done a very good jobl.
 
I will definitely look for a replacement cable/remote and then keep enjoying listening to all of my tracks again and again! And maybe buy one of those awesome UE small case to house my new sound companions!

This is my first review so keep that in mind.
 
I bought a pair used UE 900's at Cex, an electronics resale store in San Francisco. I was cleaning them and pulled the wrong way on the MMCX connector and the freakin' right unit came apart and ripped the internal wires apart. I contacted Logitech tech support and was shipped a complete UE 900s for a replacement! They were quick and helpful to respond, much better than I was.
 
So, this review is for the Logitech UE 900 and Logitech UE 900s units.
 
THE GOOD
 
These IEMs really excel at representing distinct highs. Cymbals, falsettos, and all high frequencies sound crisp and clear. Until I found the right ear tip, it was on the verge of headache inducing. These IEMs really require the time to find the right ear tip. 
 
There is low microphonics in these. They are almost silent with no music playing.
 
Bass is present but does not feel compressed or mangled. For me it's just enough.
 
Acoustic music sounds great with these. Vocals and guitar really shine through.
 
The sound stage feels medium-ish. The canal is wider than say Shure or Westone IEMs.  Not sure if that completely the reason, but like my Sennheiser IE80's it feels pretty full.
 
THE BAD
 
Mid frequencies are really not as noticeable and sometimes get lost. Female vocals, electronic music, etc. sometimes are not be optimal for these. They are not absent either. I wish it was just a little more.
 
THE UGLY
 
The construction is crap. For real. The cable and housing, while actually somewhat durable, feels fragile. I only sit and sometimes walk in these. Actually, the cheap construction helps in that people think you're listening to some crappy headphones not realizing that they retail for $300-$400. So you are less likely to get mugged in them :-D 
 
Also, they look a little "Fisher Price" like.
 
OVERALL
 
These are currently my second favorite IEM (out of my 5).  For the price the treble/bass combo is good, for my tastes.