Pioneer VSX-D736S Operating Instructions Manual page 38

Contents and changes of the setting mode
'DSPEAKER setting mode
Sets whether front, center, rear speakers of the system are used or not, and their sizes.
Switch the setting mode according to
the speaker system currently installed.
VARI OPER
@ Initially, the speakers are set as follows.
FRONT: Large, CENTER: Small, REAR: Small
® The low-level sounds of a channel set to S (Small) are playback from a channel set to L (Large) or a SUB
WOOFER (sub woofer: ON).
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