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.

Please do not update this firmware if you are using the K9Pro ESS/K9.

Bluetooth firmware download

Updated at 2023-4-27

V1.31 Bluetooth firmware download: Click here

How to update the Bluetooth firmware for K9Pro AKM: Click here

Note: 

1. Please update the firmware in Bluetooth mode and do not leave the Bluetooth mode until finishing update.

2. If the firmware update fails, please restart the K9Pro AKM and update again. 

The following changes and improvements have been made for the V1.31:

1. Added PEQ support.

2. Miscellaneous bug fixes.

XMOS firmware downlod

FiiO USB DAC driver: Click here

How to update the XMOS firmware for K9Pro AKM: Click here

XMOS B18 firmware download link: Click here

How to check the XMOS firmware version of K9Pro AKM:

You could check the firmware version via the FiiO Control panel after install the FiiO USB DAC driver in the Windows computer. (Take Q5 as example)