MSI RD480 Neo2 - Manual (Page 108)

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Test Speakers
You can select the speaker by clicking it to test its functionality. The one you
select will light up and make testing sound. If any speaker fails to make sound, then
check whether the cable is inserted firmly to the connector or replace the bad
speakers with good ones. Or you may click the auto test button to test the
sounds of each speaker automatically.
Subwoofer
Front Right
Rear Right
C enter
Front Left
Rear Left
Side Left
Side Right