Yamaha DSP-A1 Owner's Manual page 21

Note on center speaker connection:
One or two center speakers can be connected to this unit. If
you cannot place the center speaker on or under the TV, it is
recommended to use two center speakers and place them on
both sides of the TV to orient the center sound at the center
position. When using one center speaker, connect it to either
the A or B terminals and set the CENTER SPEAKERS switch
to "A OR B" (bottom position). When using two center
speakers, connect them to the A and B terminals, and set the
switch to "A + B" (top position).
If, however, you will not use a center speaker, be sure to set
the function "1A. CENTER SP" in the SET MENU mode in the
"NONE" position. (See page 26.)
Center
speaker
SPEAKERS
CAUTION
SEE INSTRUCTION MANUAL FOR CORRECT SETTING.
MAIN
FRONT
Center
speaker
A B
CENTER
+
A B
A OR B
REAR
(SURROUND)
CENTER SPEAKERS
switch
Note on a subwoofer connection:
You may wish to add a subwoofer to reinforce low frequencies
or to output low bass sound from the subwoofer channel when
reproducing discrete signals.
When using one subwoofer, connect the SUBWOOFER
MONO terminal of this unit to the INPUT terminal of the
subwoofer amplifier, and connect the speaker terminals of the
subwoofer amplifier to the subwoofer.
COUPLER
MAIN CH CENTER
PRE MAIN
OUT IN OUT
OUT
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 SPLIT
terminal to the INPUT terminal of the amplifier driving a
subwoofer, and the other SUBWOOFER SPLIT terminal to the
INPUT terminal of the amplifier driving the other subwoofer,
and then connect each subwoofer to the corresponding
amplifier.
COUPLER
MAIN CH CENTER
PRE MAIN
OUT IN OUT MONO
OUT
With some subwoofers, including the Yamaha Active Servo
Processing Subwoofer System, the amplifier and subwoofer
are in the same unit.
(Refer to page 21 for details about the SUBWOOFER
MONO/SPLIT terminals.)
SUBWOOFER FRONT REAR
(SURROUND)
MONO SPLIT
IN
Subwoofer
system
SUBWOOFER FRONT REAR
(SURROUND)
SPLIT
IN
Subwoofer Subwoofer
system system
19