Faudio: Fa4 Firmware Install __hot__

Note: If you meant a different FA4 device (e.g., a keyboard, mouse, or other IEM), please verify the brand. This guide assumes the Faudio (FiiO partnership or similar OEM) portable USB DAC/Amp.

• Your FA4 earbuds are fully charged.
• Your phone/tablet has Bluetooth enabled and is connected to the internet.
• The earbuds are not connected to any other device during the update process.

• The Issue: You hear a crinkling sound when inserting the IEM.
• The Fix: This is common in dynamic drivers. It is not a firmware bug. Use a wider bore eartip to reduce the air pressure buildup during insertion.

Congratulations on choosing FAudio's FA4, a high-performance audio device designed to elevate your listening experience. This guide will walk you through the process of installing the FA4 firmware, ensuring your device is up-to-date and functioning optimally.

Step 5: Reset and Re-pair

1. Unplug the USB cable.
2. Place both FA4 units back into the charging case for 10 seconds.
3. Remove them. They should auto-pair to each other (one LED flashes white/blue, the other turns off).
4. Forget the old "FA4" from your phone’s Bluetooth settings and re-pair as a new device.