JustBoom Raspberry Pi Zero W LossLess Audio Amplifier Hat - YouTube
Raspberry Pi Expansion Board
Geekworm Raspberry Pi HiFi DAC HAT PCM5122, Raspberry Pi 4B/3B+ X930 V1.3 HiFi DAC HAT with Power Management Function for Raspberry Pi 4B/3B+/3B/3A+/2B/B+/Pi Zero/Zero W - Newegg.com
SUPTRONICS X300 HAT Module Board Wifi / Bluetooth / Toslink / Sata for Raspberry Pi 2 / Pi 3 - Audiophonics
Amazon.com: Geekworm Raspberry Pi 4B/3B+/3B Full-HD DAC I2S Class-D TI PCM5122 Amplifier, X400 V3.0 Audio Expansion Board Sound Card | Music Player for Raspberry Pi 4 Model B/Raspberry Pi 3 Model B+ /
Raspberry Pi Expansion Board
Raspberry Pi Expansion Board
Raspberry Pi X5500 HiFi DAC+AMP Expansion Board Support X872/X710/X850 – Geekworm
SUPTRONICS X300 HAT Module Board Wifi / Bluetooth / Toslink / Sata for Raspberry Pi 2 / Pi 3 - Audiophonics
Expansion Shield x400 for Raspberry Pi B+/2B/3B/4B-DFRobot