Is the download site. Simply install it, and look for configurator in apo equalizer section on start menu.
When you run it, you'll see a list of every audio device. You should see steel series gaming headset or similar. Select it, by clicking the box to the left. I think you also need to highlight the connector name or the troubleshooting box won't show at bottom. Once it does check the box and select Install as SFX/EFX from the drop down menu, and then apply and restart.
Now you still need to ensure all the other stereo settings are correct and 3d settings are disabled where applicable.
Something that was problem for me was installing the Sonar App in the steel series control panel. It creates a sonar Virtual audio device that supposedly mimics 8 channel stereo, which is also not good for FAF, but the problem was it would default to that audio device instead of the default Steel Series Gaming audio. Disabling it from the steel series had no effect, it would just reenable itself even if i disabled the audio device in device manager. So just uninstall Sonar.
Also make sure the steel series control panel isn't defaulting to 7.1 audio.