Got a pair of KZ ED16 with upgraded cable. Somehow very clear while still being a little bassy. I dig the sound, coming from etymotic er4s and Phonak audeo pfe 12, the ED16 are similar to both with a little lower quality of treble, but still very clear and pleasing. Bass is boosted some, but is also quite clear and doesn’t seem to disrupt the mids. A fantastic back up pair of iems.
Haven't owned the pfe 12 or the er4s but the ER4XR is hopefully next. but otherwise: My sentiments exactly. I just got mine today. For 18$ they're absolutely worth it. I'm so glad chi-fi exists for budget-fiers like me.