The K13 R2R inherits the highly acclaimed FIIO-developed four-channel fully differential 24-bit R2R resistor array DAC, as used in the previous K11 R2R. It is composed of 48 precision thin-film resistors per channel, for a total of 192 resistors across four channels. Each resistor features 0.1% accuracy and low temperature drift (30ppm).
This R2R DAC allows the K13 R2R to deliver a uniquely rich and musical sound. In addition, the NOS (Non-Oversampling) and OS (Oversampling) modes bring two different listening experiences.
https://www.fiio.com/k13r2r
