I tested these out with instrumental music. I think in instrumental music, the vocals are not pushed forward as more vocal focused recordings. It doesn't sound very exciting with instruments. I think these are great for vocal focused recordings, but not for instrumentals. I think for better instrument sound you need iems that outputs sound more naturally, and these seem to be more for electrical sounds.
Not sure, but I think it's the treble that is quite overbearing for the instrumental sounds.
Edited by SilverEars - 3/30/14 at 11:54am