PSB refer to their headphones as Personal Speakers, for good reason. When you listen to loudspeakers, the room plays a big part in how they sound. Try taking your speakers outside and you'll be surprised at the difference.
PSB headphones feature a technology that gives the sound life as if it was being played inside your favourite space, offering an in-room experience as opposed to sounding like it is coming from inside your head. PSB developed and patented this technology, it is called RoomFeel™.