There's nothing to say on sound other than it is transparent. Perfect. Pure bliss. Very silent and very distortion free. A true high fi piece of gear at an outstanding quality. The bad news is you need eq to make it sound good as with all neutral gear. You have now 3 slots for peq (parametric equalizer) in app that can be memorized with a preset. Unfortunately you can't name them so you have to remember which is which when you change headphones. UI as an experience is a little frustrating, there's nothing difficult, it just is not the smoothest of...

Truthear Zero Red is a true Hi-Fi IEM in what may be the more classical definition of "high fidelity": it makes you feel as if you were live at the concert the moment you wear them and press play. These are really a true fidelity instrument and a very refined one, don't underestimate them because of the price: the tuning is, simply put, correct, you can hear all frequencies of the spectrum loud and clear. There are no annoying veils or bothersome muffling with this IEM, just pure joy and the sensation to have broken the barrier of reproduction to...