Yamaha DSP -A780 Operation Manual page 8

Setting Up Your Speaker System
This unit has been designed to provide the best sound field
quality with a full five-speaker system setup, using one extra pairs of
effect speakers to generate the sound field plus one center speaker
for dialog, when using Dolby Pro Logic Surround decoding. We
therefore recommend that you use a five-speaker setup. A four-
speaker system using only one pair of effect speakers for the sound
field will still provide impressive ambience and effects, however, and
may be a good way to begin with this unit. You can always upgrade
to the full five speaker system later.
Use of the Center Dialog Speaker Is Recommended
With digital sound field programs No. 5 through No. 16, by using
either the Directional Enhancement circuit or the Dolby Pro Logic
decoder, decoded signals will be output from the center channel.
Therefore, if you want to upgrade the Audio/Video home theater
system, it is recommended to use the center speaker unit.
If for some reason it is not practical to use a center speaker, it is
possible to enjoy movie viewing without it. Best results, however, are
obtained with the full system.
It is also possible to further expand your system with the addition
of a subwoofer and amplifier. You may wish to choose the
convenience of a Yamaha Active Servo Processing Subwoofer
System, which has its own built-in power amp.
6
5 Speaker System
This is the recommended speaker
system, providing the best sound
effects.
With sound field programs No. 1
through No. 4, using effect speakers
reproduces the effective sound field.
With the sound field programs No. 5
through No. 16, the center speaker
provides precise center localization.
Center Mode—Set to NRML or WD.
(See page 22.)
4 Speaker System
Simple system without center
speaker.
With sound field programs No. 1
through No. 4, a sound effect matching
that of a 5-speaker system can be
obtained. With sound field programs No.
5 through No. 16, center sound is output
from the left and right main speakers.
Center Mode—Set to PHNTM.
(See page 22.)