42” 5.1 Home Theater Sound Bar with Subwoofer and Satellite Speakers

42” 5.1 Home Theater Sound Bar with Subwoofer and Satellite Speakers

  • S4251w-B4



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42” 5.1 Home Theater Sound Bar with Subwoofer and Satellite Speakers



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  • 5-day service guarantee

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42” 5.1 Home Theater Sound Bar with Subwoofer and Satellite Speakers

VIZIO Sound Bar.

Award-Winning Home Theater.

The All-New 5.1 Audio Experience.

Step up to immersive surround sound with VIZIOs new 5.1 home theater sound bar. Winner of CNET’s Best of CES 2013, the VIZIO S4251w-B4 combines amazing performance with innovative features to deliver an audio experience as crystal-clear as your HDTV picture in a design that’s remarkably easy to use.

Next Level Audio Experience.

Full Surround Sound Immersion.

The VIZIO 5.1 home theater comes with a three channel sound bar, wireless subwoofer for thunderous bass, and rear satellite speakers that put you in the center of the action. TV, movies, sports and games will come to life in up to 102 dB of roof-raising volume with less than 1% of total harmonic distortion1.

Dolby Digital
dts Digital Surround
Next Level Audio Experience

Convenient Connection.

Just Set It Up, Plug It In and Turn It On.

Connecting a single audio cable is all it takes to fill any room with rich immersive sound within minutes. Every VIZIO sound bar comes equipped with any connection you might need to get your audio booming quickly, with maximum convenience and minimal clutter.

Wireless Subwoofer
Bluetooth Connectivity
LCD Display Remote

— For DTS patents, see http://patents.dts.com. Manufactured under license from DTS Licensing Limited. DTS, the Symbol, & DTS and the Symbol together are registered trademarks of DTS, Inc., DTS Digital Surround, DTS Circle Surround, DTS TruVolume, DTS TruSurround and DTS 3.0 are registered trademark of DTS, Inc. © DTS, Inc. All Rights Reserved.
— Dolby and the Dolby-D Symbol are registered trademarks of Dolby Laboratories.
— Bluetooth is a registered trademark of Bluetooth SIG, Inc.
1. S4251w-B4 is rated at 102 dB. Sound Pressure Level measured using pink noise at 1 meter, C-weighted. Total Harmonic Distortion calculated as electrical measurement of amplifier distortion.
2. Dolby Digital and DTS Digital Surround are available on select VIZIO sound bars only where specified and are not a standard feature.

VIZIO, Inc. has made every effort to ensure the accuracy of the information provided herein. All product specifications, functionality, features, configurations, performance, design and other product information described herein are subject to change without notice. VIZIO, Inc. disclaims liability for typographical, technical, or descriptive errors.

Tech Specs

  • Sound Bar Size42”
  • Sound Bar SpeakersLeft & Right Channels (each) – 2 x 3” mid-range drivers, 1 x ¾” tweeters
  • Sound Pressure Level102 dB
  • Sound Bar Frequency90 Hz - 20 kHz
  • Subwoofer Frequency40 Hz - 90 Hz
  • Audio Decoding TechnologyDolby Digital®, DTS Digital Surround
  • Sound Enhancement TechnologyDTS Circle Surround, DTS TruVolume
  • Wireless Range (Subwoofer)60’ Line of sight
  • BluetoothYes
  • Sound Bar ButtonsPower, Input, Bluetooth, Volume Up, Volume Down
  • RemoteYes – Display Remote
  • Power Input120V 60 Hz
  • InstallationTable top and wall-mountable
  • Package ContentsSound Bar, Wireless Subwoofer, 2x Rear Satellite Speakers, RCA Cables for Satellite Speakers, Display Remote, RCA to 3.5mm Audio Cable, Digital Coaxial Cable, Optical Digital Cable, Wall mounts, Quick Start Guide, Sound Bar Power Cable, Wireless Subwoofer


  • Analog Audio Input1 x Stereo RCA
  • Analog Audio Input1 x 3.5mm stereo mini jack
  • Digital Audio Input1 x RCA (Coaxial)
  • Digital Audio Input1 x Optical (Toslink)
  • USB Input1 x USB (for .WAV audio Playback)

Dimensions and Weight

  • Product Dimensions42.32”W x 3.74”H x 3.15”D
  • Product with Stand Weight8.9 lbs.
  • Satellite Dimensions3.18”W x 7.42”H x 2.77”D
  • Subwoofer Dimensions6.93”W x 12.52”H x 15.86”D
  • Subwoofer Weight14.7 lbs.
  • Product Packaging Dimensions44.5”W x 10”H x 18.6”D
  • Product Packaging Weight33 lbs.

VIZIO Warranty

  • WarrantyOne Year Parts & Labor. Free Lifetime Technical Support.
Quickstart Guide (English) Download
Quickstart Guide (French) Download
Quickstart Guide (Spanish) Download
Data Sheet Download


Firmware update version 1017 for the VIZIO S4251w-B4 Sound Bar. Download and follow the instructions below to update your S4251w-B4. This update addresses audio dropout on some units when changing channels using your Cable or Satellite Set Top Box. If you do not experience this issue, it is not necessary to update your sound bar.

Firmware Upgrade Guide Download
Firmware Download

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