Just released my review of the F9 on
The Headphone List and
Everday Listening, I've taken a slightly more critical approach but I do still enjoy the earphones and find them to be a nice performer for the price. The build and design are excellent and they look even better in person than in the photos! The tuning is a bit subjective, the treble isn't my main issue but the midrange which I suppose could be a byproduct or culmination of other factors. Still, the F9 is very technically impressive which means it'll be a prime target for eQ after which it can be quite excellent. It's also a pretty tip sensitive earphone, Brooko definitely has the right idea with foams.
I should note that I referenced some other reviews in my article and would like to express that I have endless respect for other's opinions, but I wanted to provide the most objective evaluation possible since all of my comments are both subjective and relative. Regardless, I hope you guys find the review insightful, I've added all the budget iem comparisons anyone could hope for, I'm starting to think it's my speciality! Thanks for your time, Ryan.