Well, one is German, the other one Austrian… what do you expect? (highlighted text)
That said, the SD2 is a phone several (perhaps many, even) would find a bit boring because it's closer to a reference type IEM, but it is rather exciting to these ears and a very good all-rounder. The FA4s are sonically a step above the SD2s, to these ears, in the way they render music irrespective of what is considered more 'correct' from a FR standpoint. Not only are the FA4s more realistic sounding but they do have a fuller, more 3D sound, with very, very good extension at both ends of the spectrum — layering is simply excellent for a (German-made) 385€ IEM that can compete in more ways than one with several $1,000+ IEMs. It's also an excellent all-rounder and supremely comfortable.
Edited by music_4321 - 8/26/13 at 11:23am