Yamaha DSP-A1092 Owner's Manual page 30

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.
COUPLER
MAIN CH
PRE
OUT
28
OUTPUT
SUB FRONT REAR
WOOFER EFFECT
MAIN
IN
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.
COUPLER
MAIN CH SUB
WOOFER
PRE MAIN
OUT IN
Subwoofer system
With some subwoofers, including the Yamaha Active Servo
Processing Subwoofer System, the amplifier and subwoofer are in
the same unit.
OUTPUT
FRONT REAR
EFFECT
Subwoofer system