IWILL KK400 Series, User Manual

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Onboard 5.1 Audio Onboard 5.1 Audio
Onboard 5.1 Audio Onboard 5.1 Audio Onboard 5.1 Audio
The onboard audio subsystem provides support for con-
necting a 5.1 speaker system to the computer.
Speaker Types
A 5.1 speaker system has the following speakers:
• Front Left & Right Channel
• Rear Left & Right Channel
• Center Channel
• Bass Subwoofer
The “5” stands for the five speakers and the “1” for the
Subwoofer. These speakers make up the full set for a
Home Theater speaker system.
Speaker Connections
There are several means of connecting a 5.1 speaker sys-
tem to the board. The rear I/O panel provides the follow-
ing connections:
• Line Out: For the Front Left & Right Channel speak-
ers. A connector from a cable for both speakers plugs
into this jack. Also used for Stereo speakers.
• Rear: For the Rear Left & Right Channel speakers. A
miniplug cable for both speakers plugs into this jack.
• Center/Subwoofer: For the Center Channel speaker
and the Subwoofer. A miniplug cable for both speak-
ers plugs into this jack.
The 5.1 speaker systems designed for computers usually
have an amplifier built into the Subwoofer housing and
come with cables to connect these audio jacks to the
Subwoofer. Additional cables then connect the five speak-
ers to the subwoofer’s amplifier.
• S/PDIF: this is a connector for a special optical digi-
tal audio cable.
The S/PDIF cable carries the entire audio signal out to a
sound system that includes an amplifier with a connec-
tion for this type of cable and a built-in decoder to differ-
entiate the audio signal and divide it into it’s various
components and send them to the correct speaker in the
5.1 system.