I can't find any IEM that is remotely close to a hi-end planar headphone like the AD or the LCD2 unless I EQ the heck out of the IEM. All the IEMs I've tried have huge treble variations that need taming. The Sony XBA-4 is probably the closest in the bass for me. I would go for the XBA-3 or XBA-30 now if I was choosing again. All of them need a low output impedance amp to work well.