Tested on my phone Sony xperia xa2 plus. With downloaded mp3 and flack files. And the installed Poweramp player. I also had to install a proprietary application from Samsung to enable noise reduction and other functions. I tested a little, of course, but in this short period of time I felt the depth and power of the sound that these small "plugs" give out. I've always been skeptical about in-ear or in-ear headphones. I prefer closed monitor ears. But today I can say for sure that the technology has reached the level when small "stand-ups" can compete (though not full-fledged) with large volumetric wired headphones. Only the music format for them needs to be used appropriately. For example flack or lossless files. And if you listen to "music from the contact" then you will not reveal the full potential of these headphones.
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