Sony STR-DG800 Operating Instructions Manual page 20

If your DVD or Super Audio CD player is
equipped with multi channel output jacks, you
can connect it to the MULTI CH IN jacks of
this receiver to enjoy multi channel sound.
Alternatively, the multi channel input jacks
can be used to connect an external multi
channel decoder.
Note
When yea make connections to the MULTI CH IN
jacks, yea will need to adjust the level of the
speakers and sub woofer using the controls on the
connected component.
DVD player, Super
Audio CD player, etc.
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OAudio cord (not supplied)
O Monaural audio cord (not supplied)
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