9. How to upgrade the firmware for KA3?
Please disconnect other players or USB DAC from the computer before updating the firmware!
1.Download the KA3 firmware files and upgrade tool: click here
2.Install the USB DAC driver for KA3(Click here) in the Windows computer
3.Connect the KA3 to Windows computer, and run 'Fiio_Tool_V1.01'.
After 'Find Device FiiO KA3' shows, click 'start' and the firmware will update automatically;
4.When 'Firmware update success!' shows, the upgrade is finished;
5.You could connect the KA3 to your Android mobile phone and adjust the options for KA3 via the FiiO Control APP now. (How to control the KA3 via the FiiO Control APP in Android mobile phone: Click here)