NiceHCK NX7 MK4 headphone review: the fourth incarnation of hybrid headphones

✔ NiceHCK NX7 MK4 headphone review: the fourth incarnation of hybrid headphones
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Once upon a time a long time ago I already had a review of NiceHCK NX7 headphones, I think for the very first revision. Now their fourth incarnation has been released. Also with a 10 mm driver, but now it is beryllium-plated, four armature drivers and, as an innovation, with a 7-layer piezoelectric driver at high frequencies. But that's not all, the headphones come with three pairs of interchangeable filters and my favorite KB-07 ear cushions. At the same time, they want quite humane money for such a treasure. Let's talk about that.