Bose SOUNDTOUCH 300 Quick Start Manual page 3

Choose an audio cable
Option 1 (Preferred): HDMI™ ARC
If your TV has an HDMI™ ARC connector, connect the HDMI cable to your TV's
HDMI ARC connector and the sound bar's HDMI OUT TO TV (ARC) connector.
Tip:
You may need to enable CEC in your TV's system menu to hear
audio from the HDMI ARC connector. Your TV may refer to CEC by a
different name.
U~GL_ISH
Option 2: Optical
If your TV doesn't have an HDMI ARC connector, connect the optical
cable to your TV's
Optical OUT
connector and the sound bar's
OPTICAL IN connector.