Review: Xiaomi In-Ear Headphones Pro HD

By Dmitry Kann 6 min read This post in Russian 0326

I’m not really into reviewing gadgets, but in this case it’s worth doing it. Today I’d like to review Mi In-Ear Headphones Pro HD by the well-known Chinese make Xiaomi.

Mi In-Ear Headphones Pro HD.
Mi In-Ear Headphones Pro HD.

I ordered the headphones on eBay after a few pretty positive reviews I’ve heard. The specs looked quite attractive considering the price of only €21 (shipping to the Netherlands included).


What’s so special about these earphones? Quite a bit according to the item description. The company advertises Headphones Pro HD as a premium product, and that is reflected in its specs, materials used, and particularly packaging.

As the name suggests, it’s in-ear headphones, and they feature a hybrid triple driver:

  • Dual dynamic driver with graphene diaphragm — for low and middle tones;
  • One balanced armature driver — for high tones.

This effectively turns the earpiece into a three-band speaker, where each of the three frequency ranges (lows, middles and highs) is handled by a separate driver.

The inside of the earphone.
The inside of the earphone.

All the external elements, i.e. the earpieces, the remote control and the jack, are made of metal, anodised aluminium alloy. This looks and feels great.

The headphones (Xiaomi’s render).
The headphones (Xiaomi’s render).

Black inserts are made of durable zircon sand blasting.

What’s also noteworthy is that the cable is made of TPE elastomer: it’s slippery, which facilitates disentangling, and stretchable, which should in theory make it more robust.

The company also mentions the radial pattern with 0.14 mm pitch that “imitates CD pattern”, but I can’t really appreciate the importance of this.


The product page provides the following information:

Product nameMi In-Ear Headphones Pro HD
Model no.QTEJ02JY
Type of HeadphonesIn-Ear
Weight17 g
Wired controlAvailable
Cable length1.25 m
Jack type3.5 mm
Rated power5 mW
Speaker Impedance32 Ω
Sensitivity98 dB
Frequency response range20 - 40,000 Hz
StandardsQ / WMSX004-2016

Note the insanely high upper boundary of the frequency range of 40 kHz. This, however, doesn’t mean much because you can only speak of frequency range in the context of the allowed tolerance. It’s common to use a tolerance of ±3 dB (because a volume change of this magnitude is hardly audible), however since it is unspecified, it may be anything, like 6 dB or 12 dB.

The headphones also have a somewhat low sensitivity of 98 dB, which may pose a problem should your phone’s audio output be not powerful enough.


The device is shipped in a sturdy cardboard box sealed in plastic.

The packaging.
The packaging.

What’s inside: a sturdy plastic box and a paper one with a carrying bag inside.

The contents of the package.
The contents of the package.

Here’s the net content of the package: a box, a bag and a user’s manual in Chinese:

The contents of the package.
The contents of the package.

The plastic box is pretty heavy. It contains headphones intricately wound around a silicone holder and three sets of replacement earbuds beneath it, in the sizes XS, S, and L. Including those already mounted (size M) it amounts to four and it should suffice to match any ears:

The plastic box and its contents.
The plastic box and its contents.

It takes quite a bit of patience to unwind the cable carefully laid out along the grooves of the holder.

Silicone cable holder.
Silicone cable holder.

But winding it back into the holder would obviously take an incredible amount of patience. Moreover, the designer’s idea was that the box is to be kept in the carrying bag, judging by the size of the latter.

That leaves me with just one question: is there a human being in this world who would actually store the headphones on the holder by winding the cable around it and inserting the earpieces, the remote, and the jack into the appropriate sockets, then putting the holder into the box, and the box into the bag, and then retracing these steps every time he/she wants to listen to music?

The earpiece itself looks very much like its rendered version, and leaves a good impression in terms of quality. The in-ear part is angled at 45°:

The earpiece.
The earpiece.

The full-metal remote control is located on the right headphone’s cable (some 10 cm below it) and features three buttons:

The remote control.
The remote control.

The buttons’ functions when attached to my Samsung Galaxy Note 4 are as follows, top to bottom:

  • Volume up.
  • Play/pause toggle, next track (double click), previous track (triple click).
  • Volume down.

There’s also a microphone on the opposite side of the control.

The wire ends with a 3.5-mm jack. It isn’t angled, which I think is for the better as it reduces the risk of breaking it off.

The jack.
The jack.

The sound

The most important is of course the sound the headphones produce. In my audiophile career I’ve listened to lots of headphone devices in a broad price range.

The sound of Mi In-Ear Headphones Pro HD is peculiar. On the one hand, the high tones are brilliant and well detailed, I’d say these are ones of the best headphones I’ve ever listened to in that respect. It makes cymbals, for instance, sound perfectly clear.

On the other hand, I’m used to the powerful bass of my good old Koss Porta Pro, and the Mi device doesn’t really shine here. That said, the lack of bass can be somewhat mitigated by equalisation. The good news is that treble still sounds very clear when you pump up the bass.

Once again I’d mention their not-so-great sensitivity (especially compared to the mindblowing Koss Porta Pro), which is the price of having a three-band passive crossover. With these headphones I have to turn the volume of my Galaxy Note all the way up to the “safety limit.” But there’s an upside to it, too: the low sensitivity makes volume steps smaller, which allows for a smoother volume setting.

I also use my Mi In-Ear Headphones Pro HD as a hands-free, and the mike is reportedly doing its job well.



  • Nice design and high quality assembly
  • Robust and durable materials used
  • High tones are clear and well detailed
  • The remote control’s functions are useful
  • Built-in microphone
  • Shipped with four earbud sizes
  • Very affordable (ca. € 21)


  • The bass is a bit weak for this amount of treble
  • The user’s manual is in Chinese only
  • The carrying bag and the box are useless unless you’re a Buddhist monk
  • Somewhat low sensitivity

The bottom line is: I’m sure I haven’t seen anything matching this model’s characteristics at this price. Well done Xiaomi! I’m now using the headphones on a daily basis. ■

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