Is there a way to adjust the sound quality output on a M1 Mac Mini?

The Mac mini has a really small speaker. For better quality sound you need to connect an external speaker system to the Mac mini. External speaker systems very in price and depending on the system, can be connected to the headphone jack, a USB port or via Bluetooth.

for some good examples:

https://bytexd.com/hardware/best-speakers-for-mac-mini/

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

https://macexpertguide.com/best-speakers-for-m1-mac-mini/