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 for KA5: Click here

How to update the KA5: Click here

Note:Please disconnect other USB devices, disable other running programs of the computer, and ensure no power outages during the upgrade process!

KA5 V1.40 firmware download: Click here

Updated on 2024-03-12

Changes and improvements about new firmware are as follows :

Fixed the problem that the device may occasionally display an incorrect version number.

KA5 V1.30 firmware download: Click hereor KA5 v1.30.zip

Updated on 2023-04-15

Changes and improvements about new firmware are as follows :

1. Fixed the issue where the sampling rate is not displayed after the computer enters sleep mode.

2. Miscellaneous bug fixes.

If your KA5 stuck in 'FiiO' after updating the firmware, please burn the firmware following the help in this package for help: Click here