“what is the difference between a 2.1 channel and a 3.1 channel system?”

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• The difference is in the number of front firing speakers. As a 2.1 system, the LG 2.1-Channel Soundbar with Wireless Subwoofer and DTS Virtual: X, Model # SL5Y only has 2 stereo speakers (Left & Right) in the sound bar. In a 3.1 system, the Soundbar will also have a center speaker in addition to the two stereo speakers (i.e a center, left and right speakers.) hence the 3.1 configuration. The [.1] is for the Subwoofer...^IFV

  Answered by LG Digital Customer Care 6 years ago

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• 2.1 describes a sound system with two channels (Stereo Left and Right) plus the additional subwoofer (.1) 3.1 adds a center channel which is typically used for dialogue and improves clarity of the treble frequencies.

  Answered by Beard11 5 years ago

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