The NiceHCK NX7 MK3 is a 4BA + 2 DD + 1 Piezo hybrid earphone is characterized by a warm bass superimposed over an otherwise neutral tuning that excels in resolution. It comes with three tuning filters two of which are too hot for me. The third, black filter is the long awaited fix for the western ear plagued by the two previous NX7 iterations.
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https://www.audioreviews.org/nicehck-nx7-mk3-review-jk/