Depending on who you talk to, Sony is either a good or bad headphone company. Their most popular headphone is the V6 and the variations of it but aside from that, most of their offerings I would say are tuned for the typical music listener’s ears and not really for audiophiles (i.e. lots of ‘oomph’ on the sound signature). However, not a lot of people realize that Sony made some expensive headphones as well with the MDR R10 and even Sony Qualia which both cost well over $1000. Both headphones have been discontinued since.
Then there’s the Sony MDR-1R line.