I had the IE 900 for two weeks, with over 150 hours. They are so aaamaaazing! Not only do they sound great, they are so light and comfortable. The IE 900 is so good that I sold my other IEMs, including the Campfire Audio Polaris II, Dorado 2020, Solaris 2020, and gave my UM Mest II to my dad. All of these IEMs are excellent in certain areas or genres of music, but I feel the IE 900 is the best all-rounder across the board, from musical qualities to comfort. I’m using the Sony WM1A (MrWalkman custom firmware Dawn Plus). DSEE AI on, DC Phase...