MSI 655 Max User Manual page 87

MS-6730 ATX Mainboard
Center/Bass Output Swap: Enabling this option will exchange the center/
bass output channel. PC speaker manufactures define typically that the center
signal is delivered by tip of the stereo plug and the bass signal is by ring of it,
as the figure showed below. However, some speakers have opposite definition.
Please use this option to solve the possible trouble.
Center
In the left side, check the radio button next to the speaker to fit your audio
devices. In the Audio Jacks tab in the right side, the audio will function as it
shows. Please confirm you have connected your hardware to correct jacks
before using.
2. With the optional S-Bracket:
Attach the optional S-bracket and the audio output will function as the
screen showed.
A-6
Bass Bass Center