Below are excerpts from the review:
What I didn’t expect was the outstanding audio quality. Its tight but uncompromised bass is accompanied by a steady, focused midrange. That focus is paired with (and in many ways enabled by) the firm but unfettered treble.
Another thing that impresses me about the Air Nyx is the ease with which it pairs with various IEMs. It’s versatile and unfussy about what it’s plugged into. Whether it’s a bright, sparkling IEM or a warm, melodic one, Nyx will weave its spell.
From: Prime Audio Reviews