really just a matter of combining it with the right amp and/or source. on my HM-601, the UERM does better than the UE11Pro, and on my iMod (usually amped via Tomahawk) the 11Pro is a tad nicer for my taste. the UERM also does really well unamped on my various computers (heresy? so be it), while other IEMs I have or had would not do well there without an amp. in the end, I just recently surprised myself by writing to someone that if I had to get rid of all headphones and only keep one, I'd most likely pick the UERM: it's versatile, accurate, does well with almost all my favorite genres, and does not require a whole lot of investment upstream.