Inspired by some other Head Fier's I've been working on attaching some numerical values to my personal rankings. The categories are all different things that matter to me and are weighted according to their relative importance-- ie., Engagement & musicality gets a score out of 20 and technicalities only 10 because ultimately the former matters a lot more to me. It may be the opposite for you, but that's ok. Let me emphasize again that I have no pretence of this being my attempt at an objective ranking, rather it's just me trying to quantify my subjective preferences. This is just a first attempt and is very much a work in progress. Following are some rankings for what I consider to be the 15 best IEMs I've yet heard.
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Awesome, love Score as % of Traillii.