Just received the ED9 in the mail, stuffed the bronze filters with extra foam, mark me super impressed, and this is coming from being spoiled by Dunu Titan 1, ZA Tenore, Ety ER4 ...etc
I've been this hobby for well over ten years, and have yet to see a pair of sub 10 IEM punch so much above their price range. There is the common QC issue, as the filter in the nozzle is not fully attached to begin with, but a bit of burnishing with the side of a screw driver and it's back in place. Ended up stuffing low density foam all the way towards the filter to tame the brightness, but plenty detail and control since the simple mod.
Sound signature (after foam stuffing) wise, I find these to resemble the low end of ZA Tenore and the top end of Titan 1, with a more filled in lower mid range than Titan 1. They exhibit slight graininess towards the high end (as in pretty harmless 9k-10k), but the peaks are not too ringy. All in all incredible value and super easy to fine tune.
Sent from my Nexus 7 using Tapatalk