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The Vizio SB4020M is a 40-inch-wide soundbar with stereo speakers, Dolby Digital, SRS TruSurround and TruVolume effects, and is wall-mountable. It has two 2.75-inch full-range drivers and a 150Hz to 19.5kHz frequency response range and a 6.5-inch subwoofer spanning a 40Hz to 150Hz range.


  • Status: Available
  • Availability date: Nov. 6, 2012
  • Price at launch: $229.99


  • Alias: SB4021M-A0

Also Known As...

  • Width: 40.12 inches
  • Depth: 2.07 inches
  • Height: 4.12 inches
  • Weight: 4.8 pounds
  • Color: Black


  • Audio codecs supported: MP3


  • Audio decoding: Dolby Digital
  • Surround sound effects: SRS TruVolume, SRS TruSurround HD
  • Audio channels: 2.1

Audio / Video

  • Digital optical audio input(s): 1
  • Analog stereo input(s): 1
  • 3.5mm stereo input(s): 1

Input ports

  • USB: 1


  • Type: Sound bar, Subwoofer
  • Speaker(s): 2, 1
  • Speaker size (diameter): 2.75 inches, 6.5 inches
  • Frequency response (lowest): 150 Hz, 40 Hz
  • Frequency response (highest): 19500 Hz, 150 Hz


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