I step away for a few days and suddenly a Toneking Nine Tail discussion pops up! While I was away my own Nine Tail arrived from the Ali Anniversary sale. All I can say is WOW!
When I was a younger man, I used to obsess about stereo gear so I know when something sounds "right". As you can see in my signature, I have been around the cheaper end of the Chi-fi spectrum with some reasonable choices (in bold). The Nine Tails are the most expensive IEMs that I have bought (even though some others have higher list prices; KEF, I'm looking at you!).
The sound from the Nine Tails is simply amazing to me. With all my other IEMs I could find faults in the music that I know. For instance, most of my IEMs cannot reproduce Jeff Buckley's version of Hallelujah, around the 2-minute mark, without sibilance/distortion. The Nine Tails cruise right past that point without any issues. Another test track that I use is the opening of Born in the USA. The Phil Spector "wall of sound" that Bruce uses is very tough on most IEMs they tend to congest the sound and can't get the correct impact of the kick drums. The Nine Tails faithfully reproduces that opening with nice, clear separation and drum impact. Another "wall of sound" test track that they nail is the opening of "When you were young" by The Killers. Most of my other IEMs turn that one into a muddled mess. The Nine Tail makes "Jeep's Blues" from Jazz at the Pawnshop sound like you are sitting right there at a table listing to the music. If I close my eyes I can almost smell the smoke, and the sound of bottles makes me want a cold one!
I am not a reviewer, so I can't tell you specifically how the Bass, Mids and Highs sound. All I can say is that I all of a sudden felt like I was back in college listening to some of my friends' insanely expensive stereo systems with a grin on my face. For reference, they also stack up very well against my Fidelio X2HRs.
I clearly like the Nine Tails, But I learned the hard way that they are not for carrying around, dangling from your collar. in less than a week, I have lost one silver and one blue endcap filter. So I'm left with only one matching red pair
Now they are only for using around the house, with filters tightly screwed on.