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.

If you are using K9 Pro AKM/K9, please do not update it! ! ! If the update is wrong, you may have to pay high shipping costs to send it back for repair.

The K9 Pro ESS has the word ESS on the back! ! !

Bluetooth firmware download

Updated at 2023-4-27

V1.1 Bluetooth firmware download: Click here 

How to update the Bluetooth firmware for K9Pro ESS: 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 ESS and update again. 

The following changes and improvements have been made for the V1.1:

1. Added PEQ support.

2. Miscellaneous bug fixes.

XMOS firmware downlod

FiiO USB DAC driver: Click here

FW0.25 download: K9 Pro ESS Firmware Upgrade_English.zip