For Video Review see the bottom of the page.
 
Design & Build Quality
The UM PRO 10s are well built and look as good as most other IEMs but this is by no means the best part about their design. What I like about the design of this IEM is the compactness, Westone have clearly taken their time designing an IEM which is as small as possible with no compromises. Looking through the translucent plastic of the IEM body shows you just how little room there is to spare in the UM PRO 10s, this is especially striking when compared to the likes of the Shure SE315 where the body looks half-empty.
 
The quality of the EPIC replaceable cable is good and although the wire itself is quite thin this isn't a problem as the material feels good and it helps make the whole package lighter. The connection with the IEM itself feels very high quality and the snapping sound and hefty force required to break away the cable from the IEM makes me confident that it won't break away in use.
 
Accessories
I was in for a nice surprise when opening the UM PRO 10s box. You don't just get the standard 3 sizes of tips, you get 10 pairs of tips covering every size from miniature to gigantic in both silicone and foam form. You also get a sturdy, hard-shell carry case with a foam inside. This case is worth $17 on it's own and it is a great piece of kit, especially for live musicians whom this product is primarily aimed at. My only 2 gripes with the case is that it is a little thick for pockets and there isn't a net inside to hold the cable in place, but I'm certainly not complaining as it's great to get this as standard.
 
Comfort
I am beyond impressed with these IEMs for their comfort. The body is very low-profile meaning the IEM doesn't protrude out of the ear at all which makes it great if you want to wear a hat or helmet over them or sleep with them in. The lightness of the IEMs means that there is little to no fatiguing even over periods of hours of listening. The cherry on top for comfort is the flexibility and lightness of the cable over the ears. With the Shure SE315 I can always feel the fat, heavy wire resting on my ear and it can ache over time, but with the UM PRO 10s the wire is much more malleable and therefore conforms to the contours of my ear much better meaning it never aches.
 
Sound
The UM PRO 10s are on the brighter side of IEMs while remaining fairly flat. They're certainly not an exciting earphone and tend to favour a more accurate, analytical representation of music. Treble is detailed in my experience and when listening to more bass driven music the treble extends well and is separated nicely from the rest of the spectrum, however at louder listening you may find the highs a little uncomfortable, especially cymbals. Mids are very good, the mix of female and male backing vocals in a variety of songs from Bombay Bicycle Club's new album 'So Long, See You Tomorrow' sound natural and are easily noticeable and distinguished from the main vocals.
Bass is extremely detailed and articulate but unfortunately for some the UM PRO 10's bass is very lean and won't give much depth in bass-heavy music.
 
Using the headphone amplification from my Asus DGX doesn't result in much noticeable difference in sound quality, soundstage or separation with these IEMs at all. However the greater amount of equalisation settings available on the PC meant that I could tweak the EQ to help reduce the brightness of the IEM making the treble at high volumes more comfortable and less forward.
 
In my opinion these IEMs are a little too bright and I do prefer the slightly warmer, if less detailed sound signature of the Shure SE315s however this is completely down to opinion and the sound signature of the Westone's is no doubt preferable to a great deal of people.
 
Overall
I am impressed with the UM PRO 10s in almost every aspect. The accessories package is among these best I've seen from a pair of IEMs at this price. The detail and crispness of the sound these produce is astounding and the fact that they remain comfortable for many hours means a great deal for me. With this said if you like warm, thick sounding IEMs then the Shure SE215 or SE315 are most likely better choices but for anyone wanting a bright, detailed IEM with a great set of accessories you can't go wrong!
 

Introduction
I got these headphones around Christmas time in 2012. I loved the design at first sight, I find it understated and classy where others find it hulking and ugly, it's all a matter of opinion. After the excitement of unboxing them and plugging them straight into my phone I was horrified by how quiet, lifeless and lacking of detail they were. But rest assured this first impression didn't last long.
 
Design & Build Quality
As you can probably tell from the introduction, I'm a fan of these headphones looks. For me they fit my head perfectly but for others the size of this headphone is just too big to get a good seal, so it may be wise to try them out to see where you stand in this regard. Build quality is excellent, the headphones are largely made from metal which feels very solid and has some sort of powder coating which feels very nice to the touch. The plastic on these headphones is similar to the soft touch you find on many phones these days, it's certainly not as solid feeling as the metal but it is seemingly high quality plastic. I have had these headphones well over a year now and I am glad to say that the build quality hasn't degraded and they feel as solid as the day I bought them.
 
The earcups can be rotated 90 degrees which is useful if you're taking them travelling to save space, but the absence of an included carry case makes this a useless feature for me.
 
The inclusion of a removable cable would've been a welcome one but it's certainly not a deal breaker for me. Another note about the cable is that it is very long, so I have resorted to tying part of my cable up to shorten it. Obviously this is a pro for some people but it definitely makes the headphones cumbersome for portable use. The cable itself is very high quality though and the jack feels solid with plenty of stress relief on both ends.
 
Accessories
If you're used to a plethora of accessories coming with your headphones prepare to be disappointed. The AKG K550 box comes with the headphones themselves, a 1/4" to 1/8" screw on adapter, some paperwork and that's pretty much it. Not a whole lot. However for me the only disappointment was that AKG didn't include a carry case, even if it was soft case it'd be better than nothing.
 
Comfort
These headphones have a generous amount of cushioning on the earcups making for a extremely comfortable fit around the ears themselves. However I would have opted for adding more padding on the headband as after a few hours or more there is a certain point on the headband that gives me a slight ache, nothing too uncomfortable but something could have so easily been fixed by adding more padding. Overall, the headphones feel light on the head, soft around the ears and I can wear for a few hours at a time with no discomfort. 
 
Sound
First off, I love the sound of these cans. They are relatively neutral, while still sounding a little exciting and not too analytical. They have a flair for the high end, producing magnificently detailed trebles which I find brilliant at this price point. Bass, although possibly lacking the presence of other headphones around this price I find the bass to be extremely well defined, this is accentuated in songs where you have short, punchy stabs of bass more so than when you are listening to a thicker, more full-on bass centric track. The mids aren't as well defined as the rest of the spectrum with some warmer sounding guitar tracks not providing quite as much presence in the mids as the bass and treble. With that said I still think the over signature of these headphones is very good. 
 
I have been using these headphones with my PC, using an Asus DGX sound card. Quite basic as sound cards go but I think they provide just the right amount of amplification to get the most out of these headphones. I use the 32Ohm amplification setting in the Asus control panel. When using the headphones with either a mobile phone or my PCs integrated sound card I found volume to be lacking which in turn affected how well define the headphones were but by using the equipment and settings stated above the sound is extremely well defined and the volume of the headphones is boosted a lot with no distortion. The soundstage also opens up a lot with amplification. For a pair of closed back headphones I find this pair extremely open sounding and seperation between instruments and the width of the soundstage is all very good.
 
Overall
Overall I am even more impressed with these headphones now than when I first bought them. A recent price drop to £109 in the UK means that these headphones represent amazing value. I don't feel like they can be beaten as far as sound quality and build quality goes, as long as you like the fairly neutral sound signature.