Yamaha DSP-A990 Operation Manual page 14

F
Low Pass Jack
When using a subwoofer, connect its amplifier input to this
jack. Frequencies below 200 Hz from the left main, right main
and center channels are output to this jack.
G
Center Out Jack
Center-channel line output. Not connected when the built-in
amplifier is used. Can be connected to input jack of an external
power amplifier to drive the center speaker.
H
Voltage Selector (General Model only)
Be sure to set to the line voltage in your area before applying
power. Consult your dealer if unsure of the correct setting.
I
Switched AC Outlets
You may plug other audio components into these sockets as
long as their combined power consumption does not exceed
the specified value shown. "Switched" means that these
components are turned on and off by this unit's power switch.
J
Unswitched AC Outlet (General Model only)
The total power consumption of audio components plugged
into this socket should not exceed the specified value shown.
"Unswitched" means that power is available even when this unit
is off.
12
NOTE: If an external power amplifier is connected to the front
effect or rear effect output jacks, the corresponding internal
amplifier will be turned off and no output will be available at the
speaker terminals.