Have a NUC6i5SYH with speakers plugged in to headphone jack. Have a 2.1 configuration (2 speakers and a subwoofer) but cannot configure realtek audio to recognise subwoofer. Have installed latest drivers from Intel site, but realtek audio manager only allows stereo.
Sound works out of the two stereo speakers, but not the subwoofer.
Could you please tell me more about how you are connecting the speakers to the NUC? Is it possible, paste some pictures to this thread?
Do you have a home theater or any similar kit?