MSI X99S MPOWER Manual - Manual (Page 25)

Chapter 1
1-11 Getting Started
▶Audio Ports
These connectors are used for audio devices.
■ Line-In/ SS-Out: Line-In is used for connecting external audio outputting
devices. SS-Out is side surround line out in 7.1 channel mode.
■ Line out: Used as a connector for speakers or headphone.
■ Mic: Used as a connector for a microphone.
■ RS-Out: Rear surround sound line out in 4/ 5.1/ 7.1 channel mode.
■ CS-Out: Center/ subwoofer line out in 5.1/ 7.1 channel mode.