If you aren’t experiencing any of the issues listed in Section 2, you can skip it. However, updating ensures future OS compatibility (e.g., Windows 12, Android 15).
Flashing onto a standard mainland F.Audio FA4 player will cause a severe screen inversion bug.
Ensure your battery is fully charged before starting, as a power failure during the update can brick the device. Some users have reported that reformatting the SD card to FAT32 before the update helps avoid "abnormal card" errors. for a specific serial number? faudio fa4 firmware upd
: Version 9.2 was specifically developed for an Asian-market rebrand of the FA4 sold under the Limetecc label.
Ensure the battery is fully charged and the file was not corrupted during download. If you aren’t experiencing any of the issues
Yes. You will need to reconfigure the digital filter and gain settings after the update.
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. Ensure your battery is fully charged before starting,
Do not skip these steps.
Unlike TWS earbuds (e.g., AirPods or Sony WF series), the FA4 does not have an internal System-on-Chip (SoC) capable of receiving OTA (Over-The-Air) updates. The "smart" component is the cable, not the earphone.
The update process typically involves a manual "file-on-card" method rather than an automatic over-the-air (OTA) update. Download Firmware : Obtain the correct firmware file (often in format) from authorized sources like the official F.Audio repository or reputable audiophile forums. Prepare the MicroSD Card