I took them for a digital piano, but they did not fit. The sound is just terrible, anything but a piano. Feelings as if the frequencies were deliberately twisted / cut in random order. For the sake of laughter, I tried to compare it with the old ATH-M50 in the audio interface, but where is it! . I replaced it with the HD600, of course, everything is OK with them, in any application. The piano is like a real one, the rest of the instruments are clear and natural. It is clear that it is pointless to compare the AKG K72 with the ATH-M50 and HD600, but even did not expect that headphones in this price category could be so stupid. I do not recommend. They destroyed my faith in inexpensive headphones.
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