Tested on Сowon x9. I don’t know where the good comments about the sound come from. Its "quality" is felt, so to speak, to the naked ear. There are basses, yes, but some slurred, deaf ones. Upper frequencies? Nope, haven't heard. The pitiful remnants of sound that make their way through the noisy bass are just as indistinct. Against the background of these headphones, even the earbuds from the basic set of kovon are like a balm for the soul (ears). I checked the frequency range: 20 - 9000 Hz. Understandable, not stated 10 - 24000 Hz Verdict: good for a computer. But listening to music in them is only for the most picky people.
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