Sony HT-CT800 Operating Instructions Manual page 12

Subwoofer
12
US
 Power indicator
– Lights in red: The subwoofer is in
standby mode
– Flashes in green: While
attempting link connection
– Lights in green: The subwoofer is
connected to the system with the
Link function
  (power) button
Turns on the subwoofer or sets it
to standby mode.
 LINK button (page 48)
 Ventilation holes
For safety, do not block the
ventilation holes.