Installing and Replacing Desktop Board Components 
49 
Connecting to the Audio System 
After installing the Realtek audio driver from the Intel
®
 Express Installer DVD-ROM, 
the multi-channel audio feature can be enabled.  Figure 21 shows the back panel audio 
connectors.
  The default connector assignments are shown in the table.   
 
Item Description 
A Rear surround 
B  Center channel and LFE (subwoofer) 
C  S/PDIF out optical 
D Audio line in 
E Mic in 
F  Front speakers (line out) 
Figure 21.  Back Panel Audio Connectors  
 
NOTE 
The back panel line out connector is designed to power either headphones or amplified 
speakers only.  Poor audio quality may occur if passive (non-amplified) speakers are 
connected to this output.