Yamaha RX-V992 Owner's Manual page 37

ADDING A SUBWOOFER
You may wish to add a subwoofer to reinforce the bass
frequencies.
This unit provides line-level subwoofer outputs. If you use one
subwoofer, connect either of the SUBWOOFER jacks to the INPUT
jack of the subwoofer amplifier, and connect the speaker terminals
of the subwoofer amplifier to the subwoofer.
— I0dB 0dB
MAIN LEVEL
OUTPUT
SUB
MAIN WOOFER
Subwoofer system
If you wish to obtain more presence in your listening room, the
use of two subwoofers is recommended. To connect two
subwoofers to this unit, connect one SUBWOOFER jack to the
INPUT jack of the amplifier driving a subwoofer, and the other
SUBWOOFER jack to the INPUT jack of the amplifier driving the
other subwoofer, and then connect each subwoofer to the
corresponding amplifier.
OUTPUT
— I0dB 0dB SUB
MAIN LEVEL MAIN WOOFER
Subwoofer system
With some subwoofers, including the Yamaha Active Servo
Processing Subwoofer System, the amplifier and subwoofer are in
the same unit.
Subwoofer system
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