Pimoroni Raspberry Pi Pico Audio Pack (Line-Out and Headphone Amp) | Elektor
AmpliPi - A Raspberry Pi-based whole house audio amplifier (Crowdfunding) - CNX Software
Justboom Amp HAT For Raspberry Pi - OKdo
Hopcd for Raspberry Pi HiFi AMP Module, 2x100W HiFi DAC Class-D Stereo Audio Expansion Board for TI TPA3116D2x2, Sound Amplifier for Raspberry Pi 4 Model B/3B+/3B: Amazon.co.uk: Electronics & Photo
JustBoom Amp HAT Bundle with Raspberry Pi and Max2Play | shop.max2play.com
Audio Amp SHIM (3W Mono Amp) | The Pi Hut
Pi Supply JustBoom Amp HAT Audio Amplifier for Raspberry Pi | RS
IQaudIO DigiAMP+ DAC & Class D Amplifier for Raspberry Pi | Elektor