Vantec UGT-S110 User Manual page 6

5. Center/Subwoofer (orange): Connect to center/subwoofer
speakers while 6/8 channel speaker mode is enabled (via external
amplifier)
6. Back-Speaker (gray): Connect to back speakers while 8 channel
speaker mode is enabled (via external amplifier)
7. S/PDIF Out: Connect to digital input of external audio device
via an optical S/PDIF cable
Please refer to the audio configuration table below for the function of
the audio ports in 2, 4, 6, 8-channel configuration.
UGT‐S110 Page 6