VIA Technologies VT8237R Manual page 13

6-Channel Analog Audio Output
Back Panel
(Front channels)
SPDIF jack (coaxial)
1
2 Rear Speaker Out
Center and Subwoofer Out
3
Description:
Connect two speakers to back panel's Line Out connector and four
speakers to both Line Out connectors of S-Bracket. If you want to use
Line In and MIC function at the same time, please click the Rear
Speaker Out and Center/Subwoofer Speaker Out buttons.
(showed as below)
S-Bracket
+
1
2 3
13