Yes I did. But that was before I took the mesh filters out (which are responsible for the different tunings) and stuck them onto various other IEMs. Also, did you know that you can use the ED9 bronze filters on the Nine Tail as well? They improve the overall dynamics of the sound.
Since the Monoprice MP80 filters work on the KZ ED9 and vice versa, I can infer that if the KZ ED9 Filters work on the Nine Tail, so can the MP80's. Now, that's a pleasant thought.
Just an update/PSA on this.
The ED9 and MP80 filters are interchangeable with one another. However, the ED9 and MP80 filters
are NOT compatible with the Toneking NineTail!
The filters on all 3 earphones are the same
diameter, but they are not the same thread
pitch. The ED9 and MP80 use a
fine thread pitch, and the NineTail uses a
coarse thread pitch.
If you are not familiar with the machining/hardware terminology, here is a simple photo illustrating the difference between fine and coarse thread pitch. The 2 bolts below are exactly the same diameter, but as you can see the bolt on the left has the threads cut in a much finer (closer) configuration. Coarse and fine threads are incompatible with one another; you cannot/should not screw a fine thread bolt into a coarse hole/nut, and vice versa (or you’re gonna have a bad day).
The threads on the ED9/MP80 filters look like the bolt on the left, and the threads on the NineTail filters look like the bolt on the right.
Forcing the ED9/MP80 filter into the NineTail (or the NineTail filters into the ED9/MP80) will result in stripping the threads on the filter, the earphone, or both.
I know it
seems like the ED9 filter ‘fits’, and that it is screwing down tight. But that false sense of tightness is simply the threads being mangled/stripped!
The ED9 filters are brass, and the NineTail is aluminum. Both are soft metals, which allow this to happen. However, once the threads are stripped, you’re screwed because it’s irreversible. Doh!
I tested the filters from the ED9 v1 and v2 in case KZ changed the thread size, and the results were the same. All revisions of ED9 and MP80 filters have the same (fine) thread pitch, and unfortunately all are incompatible with the NineTail.