Pioneer VSX-9500S VSX-7500S Operating Instructions Manual page 7

SURROUND EFFECT
An example for center speaker location
FRONT
LEFT
SPEAKE CENTER SPEAKER
FRONT
TWO WAY SOUND EFFECTS
NOTE:
* Rear speakers are best positioned slightly above ear level.
Note:
Dolby Surround will not operate correctly if the signal passes through
a graphic equalizer.
VCR NOISE FILTER
When playing back video tapes, if the audio channels contain noticeable
high-frequency tape hiss, pressing this switch will improve the sound.
- NOTE:
The VCR NOISE FILTER has no effect on VCR 3 playback.
SIMULATED STEREO
NOTE:
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