A:AnswerThe mute button on the headphones works when plugged straight into controller without the adapter. I would do a test first to make sure its not defective.
A:AnswerNo, the surround sound is a software feature in SteelSeries Engine, so it only works on PC. The SteelSeries website states a few disclaimers saying that the feature is available on Windows 7+ only.
A:AnswerMics that are built into the earpiece have a harder time picking up on your voice volume. Having one with a microphone arm or a extendable one offers better voice sensitivity based off the distance.
A:Answeryou have to turn off the remote and turn it back on after plugging them in for the xbox to recognize them. Then in settings you can adjust the headset volume and voice chat volume. Make sure the headset is not on mute on the side when talking. Hope that helps!