Pros: Lots of details. Prominent treble but not overshadowing bass and vocals. Moderate amount but tight bass. Really light weight for a dual driver IEM.
Cons: None really. Just make me looking further up for much better IEM.
Not going to write a long review about the sound quality here since F XT90 is one of the most popular among head-fier and most people agreed on just how good this IEM is.
I have been contemplating on buying FXT90 for about a year or so. The lowest price on ebay is 44USD by China seller artistic.life. They are selling many branded IEM without original package for a ridiculously low price. I have bought Audio-technica ckx7 from them for just 30USD. Fantastic sound, definitely an original product. The next buy was another Audio-technica - IM50 BNIB for 62USD. IM50 has been my favourite overall IEM in SQ due to its balanced sound. So when I read reviews about FXT90 I think I just have to buy this.
I saw the BNIB selling in retail store here in Malaysia for a full price of RM499 or about 135USD. That is twice the RRP for my IM50. Eventually I bought the FXT90 through Aliexpress for USD 32.90 without original packaging.
It arrived and without any hesitation I played some music through the FXT90 and then I realized ; OMG this is how the 135USD IEM sounds like! Didn't sound fake at all. Uncontestable. All my other IEM suddenly sound average at best. The IM50, CKX7, XBA10, ZA Basso, E10, Pioneer CL541 are not quite a bad IEM themselves and I know they are all original / BNIB. But FXT90 just sounds significantly better.
The only small problem I encountered that the original tip is quite shallow so I replaced it with my Huawei AM12 tip- just perfect. The other problem now is I keep on looking for a better and better IEM. The replacement for FXT90 - the real upgrade FXT200 cost 105 now on ebay. Maybe I should just enjoyed my FXT90 until some China OEM can come up with FXT200 for less than 70USD . If the FXT200 is also become popular I have no doubt that some China OEM will produce it in no time.
Next on the list- Probably Vsonic Gr07 BE, or ZA Duoza.