Perhaps because different sound signatures tend to be more suitable for specific music genres?

Here is a fun one for you all. I am around 60 years old. I can’t hear anything above around 12 kHz. So no air or sparkle for me! Guess what happens when higher frequency stuff gets lossy encoded at progressively higher compression ratios? Audio compression artifacts! Not just audio compression artifacts, but audio compression artifacts which create sounds at LOWER frequencies! In other words, totally false lossy audio compression artifacts of higher frequencies which are actually heard at lower frequencies and in the upper midrange and the lower treble.

So what do I do? I use an aggressive preprocessing rolloff filter for anything above 12 kHz when I convert original sources to 320 bitrate MP3 files. This prevents any lower octave artifacts from being created during the MP3 compression when set for a 320 kbps bitrate during compression to MP3. How? Since there basically is nothing above around 12 kHz for the lossy MP3 compression algorithm to compress. Since there is nothing to compress, then no lower octave artifacts are created. The result is that, given my age limited hearing which extends only up to 12 kHz, I don’t hear any compression artifacts or any difference between the MP3 file and the original source.

You are welcome. My favorite tips would be the Azla SednaEarFitLight eartips in terms of pairing extremely well with the nozzles on the MagicOne. I have a micro drill. I think that I will try to drill a micro hole in the side of each eartip bore near the very end where the bore meats the flange. This should give pressure relief without affecting the sound.

Nice review. I received the MagicOne Saturday afternoon and evaluated it that evening. I am sensitive to sibilance in the upper midrange and treble, yet I had no issues at all with this IEM. Vocals are quite nice. I really liked the details in the midrange and upper midrange. I found the bass to be a bit soft with a soft leading attack on bass notes and kick drums. This IEM is nice for vocals and for classical music. It does not perform as well for rock and EDM music. The MagicOne has an overall performance which makes it a poor man’s version of the Orchestra Lite which also is best suited for vocals and for classical music.

You can purchase replacement nozzles/filters for the Kato from the Moondrop Official Store on Aliexpress. See:

https://www.aliexpress.us/item/3256803559403072.html

Alternatively, the 4.0mm diameters dust filters from either of the following two Aliexpress stores should work just fine since the Kato filters are merely dust and earwax filters and are not meant to significantly affect tuning:

https://www.aliexpress.us/item/3256803958562978.html

https://www.aliexpress.us/item/3256805399657415.html