Built to the highest professional standards, the true three-way, balanced armature UM3x delivers...

Westone UM3X / 3X - True Triple Armature Drivers In-ear Monitor Professional Earphone

Average User Rating:
  • Built to the highest professional standards, the true three-way, balanced armature UM3x delivers incredibly smooth response cross the entire frequency range. Using the same technology as our custom ES3X, the UM3X is the earpiece of choice for performers desiring high-end Westone sound quality in a universal-fit package. The comfortable ComplyTM foam tips form to the ear for extended use without fatigue and provide up to 25 dB of ambient noise reduction. Equipped with a durable 50" stereo "Y" cord with a 3.5mm stereo jack, 4 pair of ComplyTM foam tips, storage pouch and wax loop.

    The UM3X is ultimate universal-fit musicians' monitor, perfect for the on-stage performer.
    Available only in clear/black.

    UM3XWestone UM3X is the newest ear canal earphones specially designed for musicians for stage monitoring. This is the highest-end triple driver with universal fit musicians' monitors, designed to offer the performing musician a well-balanced monitor no matter what instrument you play. The new UM3X uses the latest in balanced armature technology, with a true three-way crossover configuration that delivers incredible smooth response without accentuating any particular band of frequencies. Unlike the Westone 3 which was designed for playback, the UM3X was built from the ground up for professional (and amateurs) musicians that want and need the very best monitors for their performances. The UM3X is a universal fit ear canal headphone and because of that they do not require a visit to the audiologist. Each unit includes four pair of Comply© foam tips in small and standard size, a zippered carrying pouch and user guide and the UM3X comes with a durable 50" stereo "Y" cord with a 3.5mm stereo jack. The UM3X are for stage monitoring and target the musicians' market.

Recent User Reviews

  1. Gilly87
    "Does very little wrong and a whole lot right."
    Pros - Great timber, detailed and neutral mids, best separation of any IEM I've heard; very textured, well-imaged, three-dimensional sound
    Cons - Soundstage not as big as TF10, SM3, etc. A bit dark and thick with stock cable
    My setup for this review is Foobar2000 + WASAPI Event Out -> HRT MicroStreamer -> UM3X RC with Moon Audio Silver Dragon
    I traded for the UM3X about two weeks ago and I haven't used another IEM since.
    Currently listening to Classic Sinatra II in FLAC. Everything is well separated, to the point that it feels about as well-differentiated as my HD598 and DT770 in terms of instruments being presented distinctly from one another and not bleeding into each others' space; obviously soundstage size is nothing to speak of by comparison, and the UM3X is on the smaller side as far as triple drivers go, but I think that makes its ability to separate sounds amost even more impressive.  Brass, strings and vocals all have appropriate body without sounding overly throaty or bloated, and of course never bleed into each other. Frank's voice really sounds like it's coming straight from one of those old-school microphones. This is a real pleasure.
    Vivaldi's Four Seasons with Joshua Bellas first chair, also in FLAC, is next. The bass and cello notes have much more authority and power than I remember the SM3 ever having, for sure; you get that real FEELING of the instrument, whereas the SM3's more delicate sound was more about listening to the bass. This sounds much more "live" in terms of the textures and immediacy of the sound. Those rapid viola lines in Spring are not quite as crisp and distinct as I remember the SM3, but they still sound more "real," with better accuracy and timber. Violins also don't have the same exaggerated feel; they really do peak sometimes and give you that euphoria, but it's not exaggerated. The lack of the SM3's color is really appreciable here.
    Now listening to Beethoven's Bagatelle in A Minor in FLAC. Pianos are soft and subtle, but not incredibly crisp here. A very relaxing listen.  Everything sounds fine. I've heard phones that definitely have a more atmospheric effect with a piano, which is really important when you're only working with one instruments IMO. There are no SERIOUS faults here, but it's not the UM3X's strong suit.
    Bassnectar, however, is. Listening to Underground Communication in  FLAC,  and the bass is just right here: enough oomph to let you feel it, but never overshadowing other sounds, of course. The UM3X is great for giving bass-centric music plenty of power, but not overshadowing other elements of the music, which is a quality I sought for a long, long time; the SM3 served decently in this regard, but just never felt quite powerful enough; it was punchier than the UM3X, but didn't have the same sense of realistic decay and reverb. Treble roll-off shows a little bit, but not enough to detract from the music IMO. It will never be as sparkly as the TF10, but personally I don't mind, as I prefer a smoother, slightly sound in general. There isn't any information missing, so it sounds good to me.
    More EDM: Juno Reactor's Pistolero in FLAC sounds great as well. Again there could be a smidge more treble energy, but I think that's being picky; those who prefer a brighter sound might disagree. Strings have good pluck and the UM3X keeps up with everything admirably, never missing a beat, and giving that psytrance bass punch just enough oomph without bloating it or sounding artificially tight; some people prefer bass that is tighter or punchier than this for faster-paced, more intricate EDM like Juno, but I think the UM3X's more full-bodied low end, which has longer than average decay for a BA, sounds like a more refined, better controlled middle ground between a "technical" sound and what you actually hear when you witness live EDM. You can't feel it thump in your chest; this is an IEM after all, but it's tactile enough that it does justice to the overall sound. And those female vocals...the UM3X makes you feel like you're right there on the stage. Loving it.
    Anyone who says the UM3X is lacking in soundstage needs to listen to Mozar's Die Zauberflote (The Magic Flute) Scene 2 - Eine schreckliche Nacht! in FLAC or better, through a decent source, and tell me that distant rolling thunder doesn't catch you just a little off guard. This was the first combination I used to test my HRT MicroStreamer (which synergizes very well with the UM3X for anyone interested) and I literally thought there was a thunderstorm outside! Listening to excerpts from the rest of the opera, the UM3X obviously excels with vocals, and provides proper imaging to give a sense of the on-stage interaction, though not with quite the same drama as some phones with bigger soundstages.
    I'm coming to the UM3X from the SM3 and TF10, and although I occasionally miss the SM3's speed and soundstage, the UM3x gives a less colored, more tonally accurate sound that I see as hearing the music rather than the earphone, which is something I'm coming to appreciate more and more as my taste in headphones has gradually changed from bassy/v-shaped towards neutral/balanced and slightly midcentric. The UM3X also never distorts, which was a problem I had frequently with the SM3: it would sound thin and a bit weak at higher volumes: its dynamic sound would begin to falter, bass would start to sound hollow, and the soundstage would compress when I cranked the volume, never really keeping up with what I wanted for my noisy commutes. I can push the UM3x to the limits of my hearing, and its signature and presentation remain consistent; the bass never gives an inch. And while two weeks with a used set doesn't give me much room to comment on durability, I can say without hesitation that the UM3X is made with infinitely higher quality materials just by holding it; the flimsy shells of the SM3 v2 would flex with a small pinch, whereas the UM3X feels solid as a rock by comparison.
    Overall I definitely recommend the UM3X for anyone looking for a largely neutral sound with slightly elevated bass. It does full justice to music emphasizing strings and vocals, and performs well with electronic music if you don't have a need for laser-like treble. As a complete package, it is by far my favorite earphone I've owned to date.
  2. shotgunshane
    "For your ears only"
    Pros - Wonderful intimate vocals; layering and separation
    Cons - treble could be better
    Westone UM3X mini-review
    You might say I’ve been on a quest of sorts.  I’ve tried many mid and top tier universals, searching for something I can be content with for the long haul; something I can use on my daily commute that’s not only satisfying aurally but also in build and fit, with a pleasing aesthetic.
    Sound wise, I thought I might have found it in the Hifiman RE262 but ultimately is was too light in bass for my tastes and the new modular cable was too heavy and flopped around, constantly reminding me of its presence.  From that experience I knew I had to find something with really spectacular mids and better bass weight and impact.  Having an admitted bias for dynamic drivers, little did I know I’d find it in a balanced armature design!
    When it comes to pliable, easy to deal with cables and sleek, form fitting housings, no one really holds a candle to Westone.  I’ve owned both the 3 and 4 in the past and absolutely loved the build, fit and aesthetic but always found something to complain about in the sound.  Having read that several head-fiers, while ultimately preferring the 4 to the UM3X, thought the UM3X had the better mids with more bass quantity, I knew it was something I should give a try.  I had thought the 4’s mids were pretty darn good – intimate, warm and involving, so if the UM3X could do it better, it sounded like a good candidate on my quest.
    I decided to buy from Earphone Solutions, for their reputation as an outstanding authorized Westone dealer and the 2 year manufacturer warranty.  I also opted to buy the removable cable RC version. Right from the beginning I got a great fit, with great sound using the standard Westone gray flex sleeves but just to be sure, I tried all of the supplied tips, plus several others from my box-o-tips.  Yep, those gray tips are perfect.

    My initial impressions, for the most part, still hold true now after having spent many more hours and commutes with them.  Here are some of my initial impressions I shared with a couple of friends and fellow head-fiers:
    The overall presentation is pretty natural sounding, perhaps even more so than the W4. I think it is as technically proficient and just as accurate as the W4, however the UM3x can appear a little sterile, whereas the W4 was maybe more musical.  
    I like the W4 treble a better.  It’s smoother and more detailed.  The W4 is warmer and nearly as intimate in mids but the UM3X is clearer and more detailed throughout the midrange. The UM3X wins in bass hands down.  It's the most satisfying bass I've ever heard to date in a BA. If the W4 had this bass, it would have been a masterpiece for me. 
    The UM3X separation and layering is unique and a step better than the W4 but the W4 has a wider soundstage. I'd also probably give the W4 the edge in instrument realism due to its treble.  Fit is significantly better than the W4 and less tip dependent.  I put on the med gray flex tips and I'm done.
    As I said, those were my initial impressions and they’re still pretty accurate to how I hear the UM3X.  Here are some additional thoughts after using them for significantly more time:
    1. Great forward guitars; nice thickness and decent bite.
    2. Bass guitar is prominent, textured, musical and the thumping backbone to the music.
    3. Drums sound excellent: nice tight toms; snares really pop; shimmering and sparkly rides, hi-hats and cymbals without any piercing or fatiguing aspects.
    1. Very intimate soundstage with really good depth.  I haven’t heard this much depth in universal BA’s before.
    2. Unlike the SM3, there is space between backing and lead vocals, instead of being placed on top of each other.
    1. Instrument realism and dynamics improve with a cleaner, more powerful amp.
    2. Incredible instrument separation; each instrument is on its own layer and seems to rise up and out of the music if you focus on one in particular.
    1. Vocals have a very analogue/vinyl feel and presentation to them.  Always up front and center.
    2. With the right recordings, vocals are incredibly intimate; as if the performance was being made exclusively for you.

    So is this the end of the quest?  Well it’s the end of this particular quest.  I’ve finally found a universal that I thoroughly enjoy from top to bottom, use daily and entertain zero thoughts of selling.  However there is always room for a new quest: Vsonic GR08? Cardas Mirror? AKG K3003? FitEar To Go?
    I love this hobby!
  3. wdahm519
    "Great IEM!"
    Pros - Perfeclty balanced sound signiture for MY tastes
    Cons - The low end lacks a bit of detail, its nice and punchy -- very enjoyable
    Got these on Amazon for $285.00 while there was a deal going on. 
    These IEM's are great.  They have a healthy amount of bass but its still more or less detailed.  The mids are very nice to listen to, and the highs are very separated and detailed.  
    The lower end sounds a lot like my HD650's.  The mids are hard to compare to anything, and the highs are almost as detailed as my K701's but have the sweetness of my HD650's.  Its a nice compilation all together and I highly recommend them to someone hoping to spend under $300 on an IEM.

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