Fiio's four-channel desktop amp aims to deliver smooth sound in a compact, versatile package

The Fiio K11 R2R gives users the option of choosing playback via either "Non-Oversampling" or "Over-sampling" modes, with the former designed to maintain the original sampling rate for decoding and the OS Mode upsampling audio to a high sampling rate of 384kHz.

Designed to ensure various functions can be accessed simply and quickly, the K11 R2R’s multi-function volume knob is used to power the device on and off, menu operation, volume adjustment, and more. The Fiio logo adorning the top of the unit is illuminated with red, green and blue lighting, to give a quick and clear indication of the current sampling rate of the audio being played.