Not really a working sound on iMac Late 2015

The problem is that a subwoofer is also installed on this model, but it does not work in FydeOS, apparently due to the lack of drivers. Maybe there is a way to make the sound work properly?

Buy a new PC:100% Completed!

You can try reinstalling fydeos

There is such a clause in the fydeos manual

If you find that your “device” is not recognized on FydeOS and is missing functionality, you can try running Ubuntu Desktop on your device to detect the device’s compatibility with Linux systems. If it is recognized under Ubuntu and fails under FydeOS, please feel free to go to the FydeOS community for help and provide detailed hardware information to help our development team further improve hardware compatibility.