“What is the difference between the 2.1 and 3.1 versions of this soundbar system?”

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• The 3.1 channel version has a center channel - a separate speaker in the middle of the sound bar - in addition to the left and right end speakers. This can provide notably better dialog clarity as most dialog (voices) come from the center speaker. With only 2 channels the voices are mixed with the music and sound effects in the left and right speakers.

  Answered by Techguy 9 years ago

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• The "3" is a center channel you can turn up to hear certain frequency ranges better, namely dialogue. This is handy for movies where the sound effects drown out the dialogue.

  Answered by Bosco 9 years ago

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• The 3.1 has three speakers in the bar.

  Answered by tisoncal 9 years ago

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• The 3.1 has 3 speakers in the sound bar which lets you get closer to surround sound. It has a center, left and right speakers. The 2.1 only has 2 stereo speakers in the sound bar. Both come with the subwoofer.

  Answered by Golddrum 9 years ago

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• The SB3821-D0 has three 2.75 inch Full Range Drivers for Each Channel and One 5 inch Subwoofer Driver.- Jesse

  Answered by VIZIO 9 years ago

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