SR11 firmware burning tool download link:  https://fiio-firmware.fiio.net/SR11/%E8%8B%B1%E6%96%87%E5%9B%BA%E4%BB%B6/SR11_burning_tool_V174.zip

Unzip the package to get the instruction and firmware.

If the firmware burning fails, please try to select the firmware file manually: 

1. Open the tool and enter '0' in the mark of the following picture: 

2. If the password window pops up, please enter !@#

3. Select upload image

4.Please find and select the correct burning firmware file

5. When the black window shows following message, the firmware file is detected correctly. We could click start to start the firmware burning.

6. Hold the volume knob of the SR11 and connect the SR11 to the computer via USB. Then supply power to the SR11 and it will be dected to burn the firmware.