Operation introduction for K13 R2R

A. Power on/off

The K13 R2R supports both AC and DC power supplies.

When powered by AC, set the AC/DC power switch to the AC position, turn on the AC power supply, and connect the power cable for use.

For external DC power supply, set the AC/DC power switch to the DC position, and ensure the DC power supply provides an output voltage of 12V and an output current of ≥2.5A. The DC connector specifications are 5.5 × 2.1 mm.

When the K13 R2R is powered on, long press the volume knob or use the infrared remote control to turn it off. When the K13 R2R is powered off, briefly press the volume knob or use the infrared remote control to turn it on.

B. Knob operation

①Switch working mode

On the homepage, rotate the menu knob to enter the working mode menu. Rotate the knob to successively switch between USB IN, OPT IN, COAX IN and BT IN. After selecting the desired mode, short press the knob to complete the switch and return to the homepage. If you do not wish to switch modes, hold the knob to return to the homepage.

②Setting menu

On the homepage, hold the menu knob for about 2s to enter the Settings menu. Rotate the knob to switch between different settings. When the current setting needs to be changed, short press the knob, and there will be flashing characters showing up on the menu. At this time, rotate the knob to switch between different settings, and short press the knob to confirm the setting. Then, the new setting will take effect with no character flashing anymore. Other settings can still be changed.

On the Settings menu, hold the menu knob for about 2s to return to the homepage.

③Adjust volume

On the homepage, rotate the volume knob to turn the volume up and down.

When not on the main interface, turning the volume knob will immediately return the system to the main interface and display the current volume level.

④Quickly switching output

On the homepage, double press the menu knob can directly jump to the output switching page, achieving the function of quickly switching output.

⑤Introduction to Settings menu

SAM(Oversampling settings):

The default option is OS and over sampling is on. When external audio datas transform to the K13 R2R, it will be oversampled and converted to a 384k sampling rate (in simple word: upscaling). Then the data will be sent to the R2R module for decoding. The purpose of oversampling is to change the distribution of quantization noise and improve the SNR.

When the SAM option is set to NOS, oversampling is off. The audio data will be decoded and processed in its original sampling to present the original sound experience.

DSD(DSD decoding mode):

The default option is D2P. When playing DSD format tracks, the device internally employs SRC to convert DSD to PCM before decoding via the R2R module.

When the DSD option is set to 1BIT: When playing DSD format tracks, no SRC processing is performed. Instead, DSD is 1bit DSD native decoding. (Note: When 1bit DSD native decoding is selected, the SAM: NOS/OS menu option is disabled.The software background will use NOS mode for decoding both DSD and PCM).