LG GX 420W 3.1-Channel Soundbar System - Manual (Page 21)

Connecting 21
Connecting
2
Surround function OFF
Sound Effect Input
Output
No rear speakers Rear speakers connected
AI SOUND PRO
2.0 Ch
5.1 Ch
7.1 Ch or more
BASS BLAST
or
BASS BLAST+
2.0 Ch
5.1 Ch
7.1 Ch or more
STANDARD
2.0 Ch
5.1 Ch
7.1 Ch or more
MOVIE
2.0 Ch
5.1 Ch
7.1 Ch or more
MUSIC
2.0 Ch
5.1 Ch
7.1 Ch or more