Yamaha DDP-2 Owner's Manual page 14

Speakers and Speaker Placement
Your five-speaker system will require two speaker pairs: the
MAIN SPEAKERS (your normal stereo speakers) and the
SURROUND SPEAKERS, plus the CENTER SPEAKER. You may
also be using a SUBWOOFER.
The MAIN SPEAKERS should be high performance models
and have enough power handling capacity to accept the maximum
output of your audio system.
Other speakers do not have to be equal to the MAIN
SPEAKERS. For precise sound localization, however, it is ideal to
use high performance models that can reproduce sounds in full
range for the CENTER SPEAKER and the SURROUND
SPEAKERS.
Place the MAIN SPEAKERS in the normal position.
Place the SURROUND SPEAKERS behind your listening
position. They should be nearly six feet up from the floor.
Place the CENTER SPEAKER precisely between the two MAIN
SPEAKERS. (To avoid interference, keep the speaker above or
below the television monitor, or use a magnetically shielded
speaker.)
If using a SUBWOOFER, such as a Yamaha Active Servo
Subwoofer System, the position of the speaker is not so critical
because low bass tones are not highly directional.
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Main speaker Surround speaker
Subwoofer
Center speaker