Just got the IE 600 in and had about 30 mins to listen! Luckily came in the same day as my Null audio cable so I was able to connect them right away. The combo is fantastic and the Null audio cable is really, really high quality.
Sound-wise I absolutely LOVE this IEM. Once you get the right fit, the bass is perfectly slammy and present in the mix while not overtaking the mids in any way. Also just love how airy these are for an IEM and how crisp everything sounds. Need a lot more listening time but very impressed so far.
Only thing I’m iffy on is the sensitivity. Unfortunately when I’m just using this with the lightning adapter to my iPhone (which I prefer for travel), I don’t have much headroom at all and nearly need the volume at the top while listening. Are there any other portable DAP’s that are super super small like the lightning adapter that would give a little extra oomph that people recommend?