Finally (no pun intended), we have a 5128 measurement of a Final IEM, the E500. Look at this beautiful downward slope.
E500 has excellent tonality and timbre, one of my daily drivers when I go to the gym.
Not too technical though, but shines for binaural tracks in soundstage and imaging. Solid set for movies and games too, though cable is non-detachable and microphonic. Really glad it comes with a set of Final E black tips, which by themselves cost $15 USD, so it is like getting the E500 IEM for 5 bucks more.
I read on forums that the QC unit variation is not the best though, have seen some with channel imbalance or some different measurements with different units.