Very quiet audio output under Windows 10 (Late 2016 MacBook Pro)
I have the same problem on a MacBook Air with the Cirrius drivers. I managed to get the volume to boost a little by checking the "disable all enhancements" box on the sound properties (as some online had suggested from a few years back), but still no where near as load as it gets on a Mac. It is certainly a driver issue but so far I've yet to find a fixed driver.