The T50RPmk4 is a brand-new headphone developed by Fostex, equipped with a completely redesigned RP planar magnetic driver. Since having debuted in 1974 as part of the T50, Fostex's first ever headphones, the renowned RP driver has been featured in numerous different headphone models throughout the years. These headphones have been regarded as first-rate monitoring headphones by musicians and sound engineers all over the world. Audiophiles have also sought RP series headphones for their fantastic versatility and unparalleled value-to-performance. Featuring a new 4th generation RP driver as well as an updated, improved housing design, listeners of all backgrounds can enjoy the increasingly-refined new generation of RP headphones from Fostex. redesigned RP planar magnetic driver. Since having debuted in 1974 as part of the T50, Fostex's first ever headphones, the renowned RP driver has been featured in numerous differ- ent headphone models throughout the years. These headphones have been regarded as first- rate monitoring headphones by musicians and sound engineers all over the world. Audiophiles have also sought RP series headphones for their fantastic versatility and unparalleled value-to- performance. Featuring a new 4th generation RP driver as well as an updated, improved hous- ing design, listeners of