If it says it is a 5.1 system then that is what it is, no setting is made for this or provided for, it is the type of system, 5.1 means it has 2 front channels, 2 rear channel, a center channel and a subwoofer, Hence 5.1 .1 being the subwoofer. The system I see in in the photo is a 3.1
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If it says it is a 5.1 system then that is what it is, no setting is made for this or provided for, it is the type of system, 5.1 means it has 2 front channels, 2 rear channel, a center channel and a subwoofer, Hence 5.1 .1 being the subwoofer. The system I see in in the photo is a 3.1