A:Answer most likely it's your xbox settings, for some reason xbox limits all headsets so that's why the mix amps help assist headsets reach their full potential.
go to
1...setting.
2..display & sound
3..volume
4.chat mixer adjust accordingly
5.party chat, set to headset.
sometimes when you hot home button it will show volume prior to settings. of so adjust there then setting and follow steps above.
each headset acts differently so its trial and error.