Yamaha DSP-A990 - Manual (Page 20)

18
CONNECTING THE EFFECT SPEAKERS AND THE
CENTER SPEAKER(S) TO THIS UNIT
Connect the FRONT effect speakers to the FRONT effect
speaker output terminals of this unit.
If the FRONT effect speakers are not used, the FRONT MIX
switch should be set to “ON”.
Connect the REAR effect speakers to the REAR effect speaker
output terminals of this unit.
Connect the CENTER speaker to the CENTER speaker output
terminals. If you will be using one CENTER speaker, connect it to
either the A or B terminals and set the CENTER speaker impedance
switch to “A OR B” (bottom position). If 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 be using a CENTER speaker,
be sure to set the Center Mode to “PHNTM” (phantom). (See page
26.)
NOTE: The speaker connections above are fine for most
applications. If for some reason, however, you wish to use an external
power amp for any or all of the effect and center channels, connect
the line level output jack(s) for each channel to the INPUT jacks of
the external amp and connect the corresponding speaker pair to the
speaker terminals of the external amp.
NOTE: If the pin plug is inserted in the FRONT/REAR output jacks,
the speaker output from the built-in amplifier will be cut off.
L R
L R
Front effect
speaker
Rear effect
speaker Rear effect
speaker
Front effect
speaker
This unit
Center speaker
Center speaker Center speaker