Sony has a long and distinguished history when it comes to making quality headphones to suit the majority of listeners. In recent years, however, their headphone business has shown signs of becoming commoditized, targeting mainstream users at the expense of audiophiles. Over the past twelve months, though, this has started to change for the better. Sony has come to the party, first with its new line of XBA balanced armature in-ear headphones, and now with its MDR-1R range of over-the-ear premium headphones. Read on in our full review of the Sony MDR-1RBT Bluetooth headphones.