F.audio Fa4 Firmware Upd [2021] -

If your Fa4 is stuck on a logo loop:

The difference between a stock Fa4 and a fully-updated Fa4 is night and day. You will experience fewer glitches, better battery life, and—most importantly—improved sound quality. Whether it's the added PEQ in v2.2 or the smoother digital filter in v2.0, each update is a free upgrade to your $500 DAP. F.audio Fa4 Firmware UPD