Fiio l21 35mm rca coaxial digital adapter cable the fiio l21 cable is professional 35mm rca coaxial digital adapter cable designed for use with fiios newest generation of players the fiio l21 rca coaxial digital adapter cable features gold plated connectors for durable and robust connection and signal transfer the cable is 90cm long excluding connectors and is sheathed in pvc features designed for use with 2nd generation fiio x3 x5 and x7 gold plated leads for durable and robust conn