Audio Amplification

Here my favorite small audio amplifiers:

Adafruit Mono 2.5W Class D Audio Amplifier - PAM8302

https://www.adafruit.com/product/2130

Stereo 3.7W Class D Audio Amplifier - MAX98306

https://www.adafruit.com/product/987

you can get them from various electronics shops in germany, even amazon:

https://www.exp-tech.de/module/audio/6050/adafruit-mono-2.5w-class-d-audio-amplifier-pam8302

https://eckstein-shop.de/AdafruitMono25WClassDAudioAmplifier-PAM8302EN

https://www.conrad.de/de/p/adafruit-mono-2-5w-class-d-audio-amplifier-pam8302-802236309.html