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VIZIO S4251w-B4 42-Inch 5.1 Channel Sound Bar with Wireless Subwoofer & Satellite Speakers (2013 Model)

4.5 out of 5 stars 2,291 customer reviews

Available from these sellers.
  • Length & Power Output: 42.0" 102dB (5.1 channels
  • Subwoofer: Wireless
  • Connectivity: Bluetooth
  • Wall Mountable: Yes; Remote Included: Yes
  • Package includes : Sound 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
1 new from $379.97 2 used from $199.78 1 refurbished from $299.99

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  • Free 60-Day Tech Support: This item is eligible for FREE Tech Support for 60 days from the date of delivery. Over the phone, our trained technicians can help you set up, configure, connect, and troubleshoot so you can start enjoying your new purchase. Owners of qualifying products can reach Tech Support by selecting your product on the Contact Us page. Learn more

Technical Details

  • DC in Jack

Product Description

Vizio S4251W-B4 5.1 Sound Bar Speaker - Wireless Speaker(s) - Black S4251W-B4 Multimedia Speakers

Product Information

Technical Details

Brand Name VIZIO
Item Weight 8.9 pounds
Product Dimensions 3.1 x 42.3 x 3.7 inches
Item model number S4251w-B4
Batteries 2 AAA batteries required. (included)
Color Name Black
Specification Met Energy Star Compliant
Special Features DC in Jack
Speaker Type Dual Speaker
Impedance 4
Crossover Description n/a

Technical Specification

Additional Information

Customer Reviews
4.5 out of 5 stars 2,291 customer reviews

4.5 out of 5 stars
Best Sellers Rank #5,056 in Home Theater (See top 100)
#38 in Electronics > Home Audio & Theater > Home Theater Systems > Sound Bars
#598 in Electronics > Home Audio & Theater > Speakers
Shipping Weight 33.2 pounds
Date First Available May 1, 2013

Warranty & Support

Product Warranty: For warranty information about this product, please click here [PDF ]
Product Warranty: For warranty information about this product, please click here [PDF ]


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From the Manufacturer

Award-Winning Home Theater

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.

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 distortion*. *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.

Crafted For Convenience.

Adding theater quality 5.1 surround sound to your room has never been easier. With a range of digital and analog inputs, all cables included to connect to most any HDTV, and easy to install wall mount brackets - you can saturate your room in sound with maximum convenience and minimal clutter.

Seamless Streaming.

Forget docking. Built-in Bluetooth technology makes it easy to wirelessly stream your favorite music or Internet playlist from your smartphone, tablet or PC. Spend more time playing your playlist and less time playing around with wires.

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Wireless Subwoofer.

This subwoofer can be placed anywhere in the room — wireless means you get great sound and your home stays free of clutter. Rich, powerful bass transforms movies, music, and TV into an explosive experience. Wireless Subwoofer range approximately 60 feet – line of sight from sound bar.

  • Dolby Digital
  • DTS Circle Surround
  • DTS Digital Surround
  • DTS TruVolume
  • Wireless Subwoofer
  • Bluetooth Connectivity

Read about our customers' top-rated sound bars on our Sound Bar Reviews page.

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

I have seen several people mention that they dislike how the sound bar automatically seems to turn off the moment it stops receiving any audio signal, even if it's very brief. I have even read how some customers ended up returning the product because they couldn't figure out how to turn off this feature. Reading the manual I found the solution where I least expected it. You can turn off this automatic default feature by turning off the VZtv Rmt setting. For some reason, they combined the automatic sound bar turn off with the VIZIO TV remote setting. Anyways, once you turn it off the soundbar no longer automatically turns off when changing channels or in-between custcenes while playing a game.

As for the rest of the product: It's great as long as you plug it in correctly. If you do not see the DOLBY DIGITAL /DTS light when you turn on your sound bar and TV, then it's because your tv is not outputting true 5.1 sound. Yes, your sound bar will automatically create a faux 5.1 surround, but for the real 5.1 quality you will have to connect your soundbar directly to whatever you are using to stream or play movies and not the TV.

Something else I haven't seen other users mention is how shows you may be watching via a streaming service, such as Netflix and Crunchyroll, will not output true 5.1 even though all the settings are set up correctly and the soundbar is lit up with the DOLBY/DTS light. It seems to be because the show you are trying to stream isn't calibrated to output at true 5.1 for whatever reason and you end up not having any output in the satellite speakers.
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34 Comments 1,241 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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I can't add or refute praise buyers have posted for this soundbar system's audio fidelity and quality. After all, it was picked by CNET to receive the 'Best Product of CES' award at this year's Las Vegas "Consumer Electronic Show". I've waited since January to buy it, and finally, it became available locally at one of the discount box stores near me.

But, I can tell you, the unit I purchased was not ready for prime time, as several others have pointed out in their reviews. Recent reviews give me more hope. One reviewer said, "..the first unit I had would go silent when changing channels while using cable. Probably due to audio format changes between hd and regular channels but not sure. I would then have to turn the sound bar off then back on to get sound.", he said.

Folks, that was an understatement. After a pretty easy set up and using only the optical cable link from my optical output of my large flat screen Samsung to the soundbar, I immediately heard a dramatic difference in sound quality when compared with my older Vizio 2.1 system that had performed well despite it's inherent limits.

Then, using my whole system Logitech remote, I switched from a live cable program source in HDMI 1 to my Blu-Ray device. So far, so good. That is until I skipped DVD chapters or fast-forwarded the DVD. The audio dropped out and would not return unless I rotated through the various inputs to re-initialize the audio in the "optical" input on the Vizio remote. No amount of tries or even DVD changes would prevent this. Next, I tried switching to the HDMI input for the Roku streaming device, but any fast-fowarding of video of a movie in progress suffered the same audio loss, no matter if I used Amazon Prime content or Netflix.
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81 Comments 1,328 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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If you'd asked me a couple years ago which 5.1 sound system to buy, my answer would have been simple: "none."

They were a big expensive pain. It seemed like my friends who had these systems would either have them only half set up (say, ditching the surround speakers) or fully set up but not used (because the input selection or the remote was too much of a pain). My previous roommate had a 5.1 "surround" system - with all five speakers under the TV. We rarely used it because we had to change 3 settings in 3 different places to make it work.

Let's review the misery of yesterday's 5.1 systems, shall we?

1) You needed to place and wire six speakers: left, center, right, left surround, right surround, plus a bass module. That's a lot of wires, speaker stands, and connections.
2) To connect the left and right surround speakers, you needed to run wires across your seating area. That's pretty ugly unless you go through the effort to make conduits or buy a special rug.
3) You needed to purchase a separate receiver to power those speakers - and connect it too.
4) You paid for all that - an absolute minimum of $400, with nicer gear easily double that.
5) You needed to manage additional remotes and settings. Good luck if you ever asked a friend to change the volume.

Well, it's almost as though Vizio started with this list, and then eliminated these problems one by one when making this 5.1 soundbar. The soundbar itself combines Left, Center and Right channels into one thin module that will fit in front of your TV, assuming you use a TV stand with at least two inches of space there. There are no speaker stands or speaker wires, and no separate receiver - the amplifier is built in!
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97 Comments 1,274 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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