Brent said: The more I listened to the M4U 4s, the more I warmed up to them and the less I wanted to listen to any of the many other earphones I have. The PSBs’ mids and treble are so uncolored, and their bass so precise, that I have to think that the M4U 4s will be the go-to earphones for me.
Read the SoundStage! Xperience review.
The gist: Brent's current reference for the genre.