Dobrescu George
Reviewer: AudiophileHeaven
I don't now the F9 Pro; but I do like the IT01. I would describe them as "fun" in the sense that the bass is full. I don't see the bass as bloated, but its there and there are time when I want that.
Some people call these v shaped; I don't see it that way. More like a lazy L. with up part being in the bass region.
I found them on Amazon.
I don't think the burn-in was as pronounced as the vendor has suggested. They sounded pretty good to me right away. With any IEM, bass tends to improve a bit once the drivers get some use but its not like a night and day effect. As one wag noted; giving an IEM a 100 hour burn in period certainly reduces returns as customers may not hit 100 hours until the return window closes. But I knew these were keepers almost right away. Now my biggest problem is that I am eyeing their older sibling, the IT04. First world issues I know.
IT04 is quite an excellent IEM as well

But to be honest, IT01 isn't quite that V-shaped, in the sense that the treble isn't quite the most enhanced one out there, but it isn't smooth either, it is a rather treble-happy IEM compared to say, something smooth, like a Westone Wx or something similar, which really has a smooth treble, IT01 by comparison has a good amount of sparkle. Comparing them to IE800, IE800 clearly has quite a bit more bite in the treble, but then again, IE800 is one of the most U-shaped IEMs there are
