Hello there! I am Charity, I'm an Independent Advisor. I'm glad to help you today!
My apologies about that. Is your microphone set as default? Go to Settings > System > Sound, and under 'Input,' ensure that your internal microphone is selected as the default device.
It's also possible that the ROG G14 is detecting the HD650s as a combo jack. If issues still persist, I would suggest getting an adapter like this :
https://www.amazon.com/SOLMIMI-Crystal-Nylon-He...
Or maybe getting an external DAC/AMP that can also benefit the HD650 since it requires a bit of amplification to run at full power.
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install.
Kind Regards,
Charity
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Please note that things might need more than one reply to completely resolve your issue, as it will completely depend on the complexity of the question and the amount of detail that you have provided me.