Which pc speakers would you recommand in combination with Mac Mini Pro?

The HomePod mini sound and integration is excellent: Use HomePod with Mac - Apple Support

You can connect a wide range of speaker systems to the Mac mini.

There are three connection options, the Headphone jack, the USB port and Bluetooth.

For some good ideas, check out the following links.

https://boomspeaker.com/best-speakers-mac-mini/

https://macexpertguide.com/best-speakers-for-mac-mini/

https://www.woosteraudio.com/best-speaker-for-mac-mini/

You're welcome.

I hesitate to recommend just any speaker system, because of quality, price and setting.

For example: a small mid range 2.1 speaker system works great is a small office or room.

While a larger system or a decent sound-bar with sub works better in a large room for watching movies.

👍 Enjoy!