Youtube review: Photos: http://dalethorn.com/Photos/iPhone6sp/Headphone_Xiaomi_Mi_01.jpg http://dalethorn.com/Photos/Audioforge/Xiaomi_Mi.jpg Sources: iPhone6s+ with Oppo HA-2/FiiO K1 DAC/amps, various computers using the Audioquest Dragonfly-2/HRT Microstreamer/FiiO E17k/FiiO E07k DAC/amps. Review notes: My first impressions of the sound of the Xiaomi/1More 'Mi' headphone are based on direct comparisons to other headphones, particularly those that resemble its design (portables mostly), but also to a few premium headphones for reference. I'll describe how I relate to the 'Mi' (i.e., my personal tastes and how I use the headphone) only after covering all of the objective issues. Nearly every new headphone I get** has been a surprise in one way or another, and the 'Mi' is no different. I'll get right to the first point, i.e. the sound. The bass has significant emphasis centered around 110 hz (upper bass), and the treble has a significant recess centered around 2-3 khz. The combination of those two effects makes the 'Mi' sound somewhat muffled compared to the more-or-less neutral/hi-fi headphones I use as a reference. But another example, the 1More MK801 I recently reviewed - a $99 headphone - tested somewhat better, because the treble had less of a recess to go with its emphasized bass. Still, since the 'Mi' sound can be improved with a slight adjustment of bass or treble using nearly any music player, and since the build quality and aesthetics are absolutely fantastic (see below), I highly, highly recommend the 'Mi' for users who are willing to give it a try. **I purchased the Xiaomi directly from China for $102 USD including shipping. The 'Mi's bass is similar to v-moda's legendary M100, but the amount of bass relative to the midrange is only about 2/3 of the M100's. Audiophiles want to know what that bass is made of of course - is it clean, tight, etc.? So since the bass is fairly strong, like the M100, to understand its quality better I perform some experiments: Start reducing from the upper bass with a parametric equalizer, and see if it thins out, or if the fundamental weight of the deep notes are still there. And the answer is yes - weighty, firm, tight - about as good as I've heard. And I've had a few headphones upward of $600 whose bass isn't so good. My final word on the sound (see also the music sample comments below), using the Apple iPhone and iPod Touch music players: I tried using the Bass Reducer setting and then the Treble Booster setting, and I much preferred the Bass Reducer setting, which provides a decent hi-fi sound with strong impactful bass. The 'Mi's build quality is outstanding - all metal as far as I can tell, with a very nice leather/leatherette headband cover, ultra-deluxe leatherette-covered earpads that I wish were the industry standard, and a gold-trim finish that makes it look better than any other small headphone I've ever seen. The range of adjustment for the headband is 3/8 inch smaller on each side from where I set it for my average-size head, and 9/8 inch larger on each side, so that will fit a very wide range of heads. The earcups rotate forward about 5 degrees for ears that slope toward the back, and rotate about 45 degrees backward for ears that slope toward the front, but the earcups do not fold flat. However, since the earcups fold into the headband making a very compact package, and a small stiff zippered carrycase is included, the 'Mi' inside of its tiny case can be carried easily in backpacks and luggage. The 'Mi' is open-back, so there's almost no isolation. Leakage is essentially 100 percent. Still, I found it usable in a public park near a busy freeway, as long as I was at least 100 yards away from the traffic. The headband has a stronger clamp than some of the small all-plastic on-ear headphones I've had, but the clamping force is lighter than most full-size headphones, and the deluxe earpads make it more comfortable than most other on-ear headphones. The cable is 4.5 feet long, double-entry and detachable, with 2.5 mm stereo plugs going into each earcup, and terminated by an Apple-style 3.5 mm plug. The control box has a microphone, and a button that provides start/stop and skip to previous/next track. The cable below the 'Y' (where the control box sits) is woven and looks very strong, but the wires going from the 'Y' to the earcups are rubber-coated and thin, although the $300 Beyer T51p headphone has much thinner wires. The 'Mi' is an ideal portable headphone in that it can be pulled off the head when not in use, and worn around the neck with the earcups pulled all the way down. Since the 'Mi' carries so easily around my neck when I'm not listening, I don't use the carrycase unless I have to pack it away. There are a lot of competitors in low-cost headphones these days, especially among the no-name or OEM brands, but the exceptionally high quality of this headphone (given the caveat about using Bass Reducer EQ) means I highly, highly recommend it for build quality, aesthetics, soundstage, and for overall sound as noted. In previous reviews I've included the following music examples with comments about how the headphones sound with each track. My suggestion is instead of reading each one as an absolute unto itself, you could compare my notes here to those other reviews and see how the 'Mi' compares with each individual track. Note that Bass Reducer EQ was used in the following evaluations.