Do not unplug the FA4 during the update. Do not let your computer sleep. Disable screen savers and USB selective suspend in Windows Power Options.
Optimizing the 4000mAh battery to maintain its 14–16 hour playback life while driving high-impedance headphones. The Risk of the Update faudio fa4 firmware upd
Before the update, the bass was authoritative but occasionally slightly loose in the mid-bass region, and the treble could be a bit sharp on certain tracks. The new firmware has tightened the low-end significantly—the bass is now punchier and more textured without bleeding into the mids. The treble has also been smoothed out, resulting in a much more cohesive and relaxed presentation that retains all the detail without the fatigue. Do not unplug the FA4 during the update
This update reportedly fixes issues such as "crackling" sounds at high volumes (70+) and improves bass response. Version Compatibility (Crucial): Before updating, you check the serial number on the back of your device. Optimizing the 4000mAh battery to maintain its 14–16
The Xunsheng FA4 has a much more active community and does receive firmware updates. For example, a firmware version is mentioned in online forums for this specific model. It's important to ensure you are searching for the correct device to avoid following irrelevant instructions.
If you are using a faudio fa4 firmware upd from before 2024, upgrade to v1.2.4 immediately.
If it’s , firmware updates may not be available at all.