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⑤RGB indicator: This light is located next to the power/volume knob.
While playing music, the indicator will display different colors according
to the sampling rate.
⑥Power/Volume knob: Turn the knob clockwise to stop and turn the
power on, then continue to rotate to increase the volume. Turn
counterclockwise to decrease the volume, continue to rotate and hear
the beep and turn off the power. When the power is off, the white dot on
the knob points to the RGB light;
⑦Linear output: Directly driven by OPA1612, to ensure the high quality
of sound reproduction, suitable for speakers, amps, decoders, etc.;
⑧USB mode selection switch: When the switch is set to 1.0, it is USB
Audio 1.0 drive-free mode, when the switch is dialed to 2.0, it represents
USB Audio 2.0 drive mode;
⑨Type C USB interface: Connect the computer (Windows system or OS
system) to get power to K3. The audio input must use this port;
⑩COAX OUT: Coaxial output port, this digital output port is used to
connect speakers, amplifiers or decoders with coaxial input;
⑪OPT OUT: Optical output port for connecting speakers, amplifiers or
decoders with optical input.
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