Yamaha DSP-A990 Owner's Manual - Page 20

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. 18 Center speaker Front effect speaker Front effect speaker L Center speaker R Center speaker This unit Rear effect speaker L Rear effect speaker R