In general, I will write the most important thing: they have been working in extreme conditions for 8 hours a day - for 1.5 years already ! They survived and are not going to break. For me, this is the main indicator. Before that, headphones of other brands and even other ears of this brand were chasing in this mode - everyone gave up in less than a year. All in all, these are the best so far. The sound is pretty flat, you have to turn the equalizer.
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