I will describe the solution to the problem with a bang. Crack you can feel on different tracks, chaotically. the quality does not depend, the format is the same, the player is the same, and the sound source (tried on 6 phones from different manufacturers). The problem is in the 14 kHz band. Well, do not hold her ears. At maximum volume, they go crazy. With a wired connection, there are no problems, and through an amp. They yell but don't rattle. Also, if you don't want to bother with the equalizer, you can simply lower the volume by one division. The service said "Why are you listening at maximum volume." This is a very strange answer. On support . There is a forum, it is American, but all the solutions there come down to "change the sound source, the problem is bluetooth" or "call the service". I already wrote about the service above. In general, the ears are very pleasant sensations. But I will take them to the service. Let them diagnose. And the laugh is that the service engineer told me "We will confirm the marriage, but you do not take such headphones again, but take the money")) I'm not lying. Like, listening at maximum volume, the headphones of the 35 line will rattle everywhere and always. It's weird to be honest. For me, if there is a function in headphones for 400 Bachinsky, it should work. Why should I adjust the equalizer, turn down the volume or something like that. As I said, I will hand them over to the service, if they confirm the marriage, I will listen to new ones in the store, if the same problem, I will take the money. But because of the convenience, I would like the same headphones. By the way, about the cod message, the American forum is crammed with info. Through one, people write about interference, cod and noise. It is strange that the company has not yet found a solution. And the solution is to release the firmware with a lower volume. Now I wear them and listen, but not relaxed. Each track I strain, I listen to the cod. Overall, definitely a replacement. In general, the ears are 7 out of 10. I might buy a Sony wh-1000xm3. I'll wear both and make a choice. If these do not change, well, let them lie)) Thank you all
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