Vizio SB4021E-A0-NA Guide De Démarrage Rapide page 10

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For the best surround sound experience, position the components as shown.*
Sound Bar is centered
below the TV.
The Sound Bar should be close to ear level.
When using the remote,
point it at the center
of the Sound Bar. The
sensor is located there.
Subwoofer can be placed anywhere in
the room within 60 feet of the Sound
Bar. Placement near a corner of the
will produce more bass in the room.