Alps F9211b
Alps is known for audio fidelity. The F9211B platform features a hardware DSP that offers:
You will most likely find the F9211B in: alps f9211b
Honestly, the Alps F9211B is the "tin can" of amp chips. If you have the unit open, consider replacing it entirely with a or TDA7854 . However, the pinouts are not identical. You will need a "DSP to Analog" converter board (available on AliExpress for ~$10) that bypasses the Alps chip entirely and feeds a clean low-level signal to a real external amplifier. Alps is known for audio fidelity
