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Review: Vizio 5.1 Sound Bar System

If you ask me what audio gear you should consider for a quality home theater setup, I'll invariably direct you toward a decent AV receiver (AVR) and separate speakers. However, not everyone is ready or willing to deal with the added complexity of AVR ownership, and this is where a kit like the Vizio 40" 5.1 Sound Bar System (SB4051-C0) is a near-perfect fit.

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In the box
The Vizio SB4051 delivers true 6-channel listening with a setup experience that simply doesn't get any easier. In the box, the SB4051 features an accessory pack that conveniently includes every cable you may need to get the system connected to a TV or other audio source device. The pack also includes wall-mounting brackets for the sound bar and surround speakers.

Cord Cutting Guide

Speaker setup
Speaker setup starts with centering the sound bar above or below a TV screen; low-profile feet give the sound bar an overall height of only 3-inches. The wireless subwoofer can be placed anywhere there's a nearby power outlet, and the rear-channel speakers connect to the powered sub via ample 25-foot color-coded wires. This configuration eliminates a wire run between the front and rear speakers for a clean look. Vizio claims a 60-foot range with the wireless sub, and its connection proved completely stable at the much shorter distances I tested it at.

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Matte-finished metal protectively caps the ends of the sound bar and tops the speakers and sub. The added heft of the metal accents and finely-perforated black metal grills that wrap each speaker literally feel like quality touches. The latter also admirably masked fingerprints and dust.

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The SB4051's remote control is simple yet effective with its handful of buttons and a 1-line display at the top that enables easy navigation of more than a dozen controls.


A row of indicator lights along the bar's left side provide a visual confirmation of level and other system adjustments, and the lights automatically fade to a single subtle point after use.

A 5-button row of controls centered on the sound bar blend in well with the overall design while providing basic control options.

TV Picture Setup Guide

Hook it up
Unlike most sound bars that provide a basic array of coaxial/optical/analog audio inputs, the Vizio SB4051 adds an HDMI passthrough that supports Audio Return Channel (ARC) with compatible TVs. Another benefit of the SB4051's HDMI input is its compatibility with affordable HDMI auto-switchers for connecting multiple digital source devices.

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The Vizio SB4051 is Bluetooth-enabled making it easy to link a smartphone or other mobile device for simple and convenient audio streaming. Regular Bluetooth audio streaming adds additional compression that can degrade audio quality, and this sound bar alleviates this shortcoming with aptX technology that enabled CD-like sound quality from compatible mobile devices.

Digital audio format support for the SB4051 includes Dolby Digtal, DTS, and several flavors of Linear PCM at up to 96kHz.

Quantum Dot Color Technology

Speaker setup
The sound bar incorporates three 2.75-inch drivers while each surround speaker features a single 2.5-inch driver. A 6-inch driver in the ported sub adds an appreciable amount of low-end kick to the speakers' small but capable drivers. A built-in quick test announces each speaker to verify the connection and proper location, but properly balancing the speaker levels would require a sound pressure meter and appropriate test material. I'd like to see Vizio incorporate an automated microphone setup for levels and timing in future models.

Listen up
After breaking in the sound bar system for a few days, I sampled a variety of audio sources including FLAC-encoded music tracks streamed via aptX-enabled Bluetooth from my phone. Vizio claims the SB4051 can produce a sound pressure level of 102dB with <1% THD, and cranking it up proved to be a neighbor-awakening experience with ample volume and plenty of distortion-free bass. Podcasts and TV shows exhibited exceptional dialog clarity from the main sound bar channels, and DTS TruVolume is available if audio normalization is needed.

Switching to high-bitrate Blu-ray content, the award-winning sound track from the movie Master and Commander highlighted the system's surround sound capabilities and impactful bass response. The movie's quieter sequences are filled with detailed ambient sounds that were well-rendered by the system's five speaker drivers. The movie's depiction of classic naval warfare gave the subwoofer a chance to shine as it added very tangible sonic accents without ever overwhelming the performance.

The album Sea Change by Beck features audio tracks that approach the bitrate and sample rate limits of the Blu-ray format, and the SB4051 delivered superb clarity and detail with vocals and numerous stringed instruments. Given the SB4051's relatively small speaker drivers, the wireless sub again proved its worth with its ability to transparently reproduce lower frequencies.

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Bottom line
I have a fondness for products that perform without a lot of fuss, and the Vizio 40" 5.1 Sound Bar System (SB4051-C0) delivered a listening experience that approached the quality of my home setup of separate surround sound speakers and a capable AVR. The Vizio SB4051 lacks the automated speaker setup tool included with many AVRs that optimizes levels and timing, but the entire kit is hundreds of dollars less than my own admittedly value-orientated home theater audio components. Modern AVRs often integrate useful features like HDMI switching, network multimedia playback, and support of a wide range of codecs. However, the Vizio SB4051's beauty is in its simplicity and flexibility while reducing the number of wires required to enjoy a true 5.1-channel listening experience.

Reader Comments (15)

Just picked up this model myself. Couldn't be happier with it. Two cheers for Vizio!

May 26, 2015 | Unregistered CommenterNirce review

Hello Robert, according to the cnet review the bass was too overwhelming even with the subwoofer volume set to 0. Did you notice this on your test sample? Thanks!

Hi John, I didn't find the subwoofer overwhelming at all with my test sample. I was especially impressed with audio quality with movies, Blu-ray audio,and audio podcasts. I would like to see Vizio add a calibration mic to the kit (as noted in the review).

May 31, 2015 | Unregistered CommenterJohn Buettner

Hi Robert,
Thank you for your review of the Vizio soundbar product. A lot of reviews I've read on Amazon complained about volume fluctuations when streaming music via Bluetooth. Did you notice this during your tests?


Hi Molly! I did not notice any volume fluctuations while testing the Vizio sound system. The Bluetooth link appeared to function well with the mobile devices I tested and my notes indicated nothing sounded out of the ordinary.

July 29, 2015 | Unregistered CommenterMolly

Hi Robert, I picked this up to go with our 70" M series UHD tv. Is there any kind of recommended settings for general TV watching and sports? Our son helped with the set up but commented that his older soundbar had calibrations etc. We're just grateful old farts who enjoy watching our crazy big TV so we're clueless about levels etc. Any thoughts?

Hi Patti! There isn't much to adjust on this speaker setup besides basic level tweaks. I'd make sure the rear speakers are evenly spaced from the main listening position and aimed toward the ears as much as possible. If you find that the sound from the surrounds is too high/low, then adjust those levels accordingly to make for as balanced of a listening experience as possible.

August 27, 2015 | Unregistered CommenterPatti

Vizio 5.1 Sound Bar is an awesome soundbar and the best soundbar under 200 dollars. I have bought one and its working awesome. I loved the review you wrote on the article and impressed with the product so i bought one and tested myself. The results are amazing. Thank you

Thank you for the positive comment, Ashwin!

October 22, 2015 | Unregistered CommenterAshwin Reddy

I did not read your review mentioning any provision for an infrared pass through feature. Many sound bars will block the ir receiver and make a one remote operation very difficult. Does this unit have such a provision?? Thanks and Happy Holidays from the Netherlands- Elsa

Hi Elsa! Good observation! I didn't test IR passthrough, but this Vizio soundbar is CEC enabled and I'd be surprised if it didn't provide some TV control functionality. Check my Favorite Mounts section for options for mounting the soundbar *above* the screen. Also, there is a Sony 'sound stand' in my Favorite Speakers section that may be a better option for you.

November 27, 2015 | Unregistered CommenterElsa

How do I get to the screen with the surround output settings ? How do you select between Dolby digital, dts, etc etc?

December 1, 2015 | Unregistered CommenterBill

When you hooked it up to your ps3 did you use hdmi arc or was it plugged in to the hdmi in on the soundbar?

December 8, 2015 | Unregistered CommenterDerrick

Plugged my PS4 directly into soundbar

December 8, 2015 | Unregistered CommenterBill

The 38" version does not offer HDMI, only optical. I understand that optical won't carry the loss-less audio codecs. So should I spend the extra $100 to get the 40" version? My TV does support ARC.

December 19, 2015 | Unregistered CommenterTim

great post thanks

May 4, 2016 | Unregistered Commentersound systems


Let's say I connect my bluray player straight to the soundbar's HDMI input and then use the soundbars HDMI output to connect it to a projector....does the projector need to support ARC?


October 6, 2016 | Unregistered CommenterFrank

Just picked up this model, I'am really happy whit my new Soundbar

April 28, 2017 | Unregistered CommenterGiacomino

Hi Heronfidelity, great publish, very informative.
I have been a regular reader of your blog. I love your writing. You are so simple & genuine and that’s what makes me connect with your writing. Thanks for sharing.

March 12, 2018 | Unregistered CommenterAraav

Hi Robert,

Just saw this review, however, I have last year's model model SB3651-e6 with built in Google Smart cast for audio, and the sound bar also has WiFi, or Ethernet. I've been really pleased with the sound bar, I live in a 1 bedroom apartment, and my main reason for going with this over a full AVR is there is no clean way to wire here, so the wireless sub helps with this.

I was wondering if you have experience with the newer models. I wanted to let you know as well, that I have an A.S. in TV broadcast, but my experience on a professional level is with SD video, and analog. I've been keeping up with digital HD, 4k, etc through programs like HDNation when it was on, and other means. I think my only hangup at this point is determining, what's a normal amount of bass vs too much. I've had 1 other 5.1 setup years ago which was a Panasonic 5 disc changer and the 5.1 was all internal so only the built in disc changer could use it. Other then that I've used stereo,

March 19, 2018 | Unregistered CommenterClinton W Salvato

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