I leave a small tip on the headphones. Maybe someone will be useful.
1. Workmanship.
Felt monolith, no creaks or loose. Compared with the XM2 in the store. Exhibit XM2 creaking (but who knows how much they are already there and what to do with them), HM3 - no. The first week HM3 listened, then he took it to the store for replacement - the left channel louder playing right about 2-3dB. The new difference too, but not large, about 1 dB, which is practically imperceptible. The complete cover is not bad, just stupid mesh outside a little confused. Complete cable 3,5mm<->3.5mm smacks kitayschinoy. Touch screen controls in both instances behave adequately. On the street wearing a min. point 2 - no problems were not with the sensor by either the headphones.
2. Comfort.
Compared with the third generation of the XM2 is much easier sitting on the ears (the space inside the ear cushions more), no pressure. Adjusting headband enough not even a big head. At a temperature of about 22 and above the ears begin sweating. But in general, wear headphones for a long time, very comfortable, no discomfort. Touch control to use comfortably, no false positives, I liked it.
3. Sound.
In my opinion the sound headphones with a standard Bluetooth connection is more suitable for electronic music. To rock them too failed the middle. Distortion is small, there is a good stereo image. Hoisting at LF noise reduction effect further increases. Precisely suited for baskhedov. The maximum volume is not very high. But I, for one, can not listen to them more than 10 minutes at maximum volume - headache. And why the volume is in the presence of the noise reduction?
The sound in the headphones depending on the connection type. When the Bluetooth connection and connect the cable with the inclusion of the headphone sound is processed by the internal DSP.
A comparison of the frequency response of the headphones incl. (Green line) and off. (Red graph) state:
Ie, if you sit down and you connect headphones cable, the sound will be much different!
Achtung! It is not necessary to evaluate the sound quality of a frequency response. In addition, this frequency response is not the truth of last resort and is only given for comparison modes. Microphone, as used in metering has a linear frequency response with a slight blockage HF.
For example, a comparison of the frequency response HM3 (green line) from Philips SHP9500 (blue) measured under the same conditions:
Skewed towards the low can be corrected with the equalizer in the company's application. But! Equalizer available when connecting with the sound quality priority (LDAC codecs, aptX).
When operating in noise-canceling mode, the headphones emit a slight hiss, which is, nevertheless, one can clearly hear in a quiet room.
4. Application and proprietary technologies.
Most of the functions in the application simply useless. The only thing what I use - the equalizer. The difference when connecting the LDAC and SBC in ideal conditions (silence in the apartment, the smartphone a meter away from the headphones), I could not hear. Compared to the entries in the flac smartphone LG V30 +. DSEE HX difference between on / off could not be found. Compared to the ten tracks mp3 128kbps. A feeling that the processing mode is switched on only in the priority stable compound (SBC codec), but the difference anyway.
5. Noise Reduction.
Noise reduction - the key feature of the headphones, for which they would be worth buying. It is organized not only actively. The very design of the headphones (closed cup, close fitting earpads) offer a greater degree of noise reduction. Active squelch works well, but not perfect. You do not immerse yourself in absolute silence. If you turn off the music - you can perfectly hear human speech, it will be muted and the low cut. Not including the music is completely isolated from the speakers above ear colleagues at work will not work. In general, inhibited by the highest frequency (probably due to construction) and low frequencies. Medium and medium-high still partially penetrate to the ear. Squelch works extremely well on the plane, where its effect is felt in all its glory. In the subway - is worse because of the mid-rattle. noise reduction by improving the optimization of atmospheric pressure (option in the app) I have not noticed.
Finally. The headphones enough marketing bullshit, but if you ignore, the product is very good, especially for those who travel a lot or go on trips to work and loves to pile on the bass when listening :) The price is too high for me. I bought for 250 euros, for the price of 350 euros, how they ask almost everywhere, probably would not have taken.