I have read through several pages of this thread since I ordered the UE 6000's yesterday. I bought them to listen to on the go as my two children and wife would never allow me to enjoy music at the house My question is when listening in passive mode, are they ok to listen to without a portable amp, do they sound decent?
They will sound just fine. Only problem might be that they are not loud enough. My rockboxed sansa clip+ has just enough power to play them loud enough. I don't believe there will be any sound quality improvements with some fancy portable amps. They will just play louder. Somebody might disagree.