First off, a MUST read. While the ADDIEM fell under the radar for a while [being vastly underrated?], Apple discretely revised the build of the ADDIEMs , but may have also tuned the sound a bit differently. The ADDIEMs labeled MA850G/A are now ME186LL/A. Certainly the performance of the new ME186LL/A is outstanding rivaling stuff that is way above it's price range. This IEM doesn't lack the bass presence of the Etymotics while having an airy, extended, smooth treble, that lacks any big resonants unlike a GR07, EX1000 or R50. With better treble bandwidth, treble smoothness, bass depth and soundstage than RE400. This is the IEM to beat at this price range. Of course, there are some things to note as no IEM is perfect A 30ohm adapter is a must, it decreases it's main distortion flaw and makes the midrange more clear and transparent. This Cowon cable is a 33ohm adapter. Almost all aftermarket tips kill an aspect of it's sound. Sony Hybrids and Comply Whoomp tips are the only ones that provide the best performance, besides the brilliant stock tips. Feel free to post any questions or concerns.