Note: When you click the links below to download the firmware, it indicates that you

have already read and agreed to the Open source licenses.

FiiO USB Audio driver

[Windows system]

Before first connecting, please go to our website to download the DAC driver（FiiO USB

Audio driver: Click here）, and install it as the instruction to enable the USB DAC function.

[Macbook]

Macbook does not need to install the driver.

KA3 V2.0.1 firmware content:

1. Optimize software configuration;

2. Version number change.

KA3 V2.0.1 firmware download link: Click here

KA3 V2.0 firmware content:

1. Added indicator light off memory function:

Single or memory shutdown can be set in the FiiO Control App. Single shutdown will light up

the indicator light after reconnection; memory shutdown will not light up the indicator light

after reconnection until the user re-modifies the settings.

2. Added dynamic power consumption adjustment function:

After turning on this function, KA3 will dynamically adjust the power consumption of the

unit according to the sampling rate of the song being played. When playing low-sampling

rate songs, it will effectively reduce power consumption, save the power of the playback

end and reduce the heat of the unit.

3. Added hardware mute switch settings:

If this switch is turned off, the POP sound of the internal music will be optimized and

reduced, but there may still be a POP sound under certain circumstances. Users can

choose to turn it on or off according to their usage habits.

KA3 V2.0 firmware download link: Click here