Thanks to the latest Xbox One update, you can now add surround sound to your LS20 and LS30 and try a different type of surround sound with your LS40 by using Windows Sonic for Headphones.
1. Go into Settings > Display & sound> Audio output on the Xbox One and set Headset Format to Windows Sonic for Headphones.
2a. For LS20 Select Use virtual Surround:
2b. For LS30/40 Select Use virtual Surround and Using HDMI or Optical audio headset:
3a. For LS20/30 if you feel you need more bass press your EQ Button until you are in bass boost mode.
3b. For LS40 press the EQ button until you hear "Stereo."