Onkyo TX-SR313 - Manual (Page 13)

Connections
En-13
Speaker Configuration
The following table indicates the channels you should use
depending on the number of speakers that you have.
No matter how many speakers you use, a powered
subwoofer is recommended for a really powerful and solid
bass.
To get the best from your surround sound system, you need
to set the speaker settings manually (
➔ page 40 ).
Attaching the Speaker Cable Labels
The speaker terminals are color-coded for identification
purpose.
The supplied speaker cable labels are also color-coded and
you should attach them to the positive (+) side of each
speaker cable in accordance with the table above. Then all
you need to do is to match the color of each label to the
corresponding speaker terminal.
Number of speakers 2 3 4 5
Front speakers ✔ ✔ ✔ ✔
Center speaker ✔ ✔
Surround speakers ✔ ✔
Speaker Color
Front left White
Front right Red
Center Green
Surround left Blue
Surround right Gray