Some USB headsets tend to be way too loud on Windows 10. I guess the reason for this are outdated drivers or some kind of incompatibility.
In my case, I had a USB headphone that was already too loud on volume 2 of 100! Since I had to suffer from an acoustic shock a few years ago, I decided to take measures to prevent this. Once a super-intelligent macOS box “fogot” my volume and I got a blast (macOS tries to remember the configured volume for each output device – but as usual: things can go badly wrong if you rely on computer intelligence. Thanks Apple.)
Fixing this is simple thanks to a handy little utility called Equalizer APO. It’s even free.
Run the installer, and select the audio device(s) you want to equalize.
To enable the equalizer initially, you must reboot.
After you reboot run the provided Configuration Editor and set the Preamp to: –16 dB (or any other value to match your preference).
(You can modify the settings also manually with your text editor atC:\Program Files\EqualizerAPO\config\config.txt)
This app can be a life saver. But be warned: On some rare days Equalizer APO may fail to start-up or a bad update, or what-so-ever, may prevent the equalizer from running and may still get a boom in your ear.
So, if you have a USB headset that is just unbearable loud when it’s not equalized, do your ears a favor and just ditch them or the will bite you.. one day.
Update: I have learned the hard way that Equalizer APO comes with another caveat:
It interferes with other audio driver / plug-ins / extensions. E.g. a etool to route or capture the sound of you PC may not work anymore.
And, as mentioned in the comments, the equalizer can only handle a limited number of channels and ditches the extra channels (like 7.1).