Cooler Master Sirus - 5.1 - Manual (Page 14)

 Speaker Settings
Speaker Mode
You can switch between stereo, quadrophonic or 5.1 mode and test each audio channel by clicking
on the playback button
Surround Max (Virtual Surround Sound)
Creates virtual surround sound by interpreting and modulating the audio stream.
If a game or movie features stereo sound only, you can use this feature to make use of all 8 drivers
in Sirus. It will create some pseudo surround effects but most notably boost the audio volume by
using all available channels and not only 2 (stereo)
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