38” 2.1 Home Theater Sound Bar with Wireless Subwoofer

  • Enjoy 100dB of room filling, crystal clear sound with less than 1% total harmonic distortion*
  • Wireless subwoofer adds rich bass from anywhere in the room**
  • Wirelessly stream your music from a smartphone, tablet or PC via Bluetooth
  • Premium audio with Dolby Digital® decoding, plus DTS TruVolume™ and DTS TruSurround™ audio post processing
  • Enjoy 100dB of room filling, crystal clear sound with less than 1% total harmonic distortion*
  • Wireless subwoofer adds rich bass from anywhere in the room**
  • Wirelessly stream your music from a smartphone, tablet or PC via Bluetooth
  • Premium audio with Dolby Digital® decoding, plus DTS TruVolume™ and DTS TruSurround™ audio post processing

Regular Price $179.99

Special Price $159.99

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38” 2.1 Home Theater Sound Bar with Wireless Subwoofer | S3821w-C0

Product Overview

Upgrade your TVs audio with VIZIO’s 38” 2.1 Home Theater Sound Bar with Wireless Subwoofer. The perfect addition to any small to medium sized HDTV, this sound bar connects easily to your TV with just one cable. The wireless subwoofer adds bass missing from your TV, all without the need to run any extra wires. Built-in Bluetooth allows you to wirelessly stream music from a smartphone or tablet, while Dolby Digital and DTS Digital Surround audio technologies turn movies, TV and games into an immersive audio experience. Rated at 100dB with less than 1% Total Harmonic Distortion*, the S3821w is one serious audio upgrade. Learn More About VIZIO Sound Bars

Bluetooth® Streaming
Bluetooth® Streaming

Bluetooth® allows for wireless streaming of music from a smartphone, tablet, computer or music player etc. Simply pair your Bluetooth enabled device with the sound bar, then sit back and DJ from the comfort of the couch.

Bluetooth® Streaming

This sound bar features a wireless subwoofer that can be placed up to 60 feet away and adds deep bass that transforms movies, music and TV into an explosive experience.

DTS TruVolume™
DTS TruVolume™

DTS TruVolume™ is a revolutionary solution that provides a consistent and comfortable volume level for a more enjoyable multimedia experience. Simply set the volume once.

DTS TruSurround™
DTS TruSurround™

DTS TruSurround™ delivers immersive and natural surround sound without adding cumbersome rear speakers and provides amazing clarity, depth and detail.

*Sound Pressure Level measured using pink noise at 1 meter, C-weighted. Total harmonic distortion calculated as electrical measurement of amplifier distortion.

**Wireless Subwoofer range approximately 60 feet – line of sight from Sound bar.

Tech Specs

Sound Bar Size: 38”
Sound Bar Speakers: Left & Right Channels (each) – 3.0” full-range drivers
Subwoofer Speakers: 6.0” Subwoofer
Sound Pressure Level: 100dB
Sound Bar Frequency: 50Hz - 19kHz
Subwoofer Frequency: 50Hz - 100Hz
Audio Decoding Technology: Dolby Digital®
Sound Enhancement Technology: DTS TruSurround™, DTS TruVolume™
Wireless Range (Subwoofer): 60' line of sight
Bluetooth: Yes
Sound Bar Buttons: Power, Input, Bluetooth, Volume Up, Volume Down
Remote: Yes
Power Input: 120V 60Hz
Installation: Table top and wall-mountable
Package Contents: Sound Bar, Wireless Subwoofer, Remote, RCA to 3.5mm Audio Cable, Digital Coaxial Cable, Optical Digital Cable, Wall mounts, Quick Start Guide, Sound Bar Power Cable, Wireless Subwoofer Power Cable


Connections (Rear)
Analog Audio Input: 1 x 3.5mm Mini Jack
Analog Audio Input: 1x 3.5mm stereo mini jack
Digital Audio Input: 1x RCA (Coaxial)
Digital Audio Input: 1x Optical (Toslink)
USB Input: 1x USB (for .WAV audio Playback)


Sound Bar w/ Feet (rubber pads): 5.2lbs
Subwoofer: 9.5lbs
Gross: 20lbs


Sound Bar w/ Feet (rubber pads): 37.94"W x 3.63"H x 2.88"D
Subwoofer: 13.5"W x 11.0"H x 6.0"D
Packaging Dimensions: 40"W x 7.6"H x 17.0"D


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

Customer Reviews

Good for price Review by 3rdiguy

I really like the sound of this coupled with the subwoofer but the directions aren't clear on how to get it back to tv sound after using bluetooth. I still don't completely know how to get it back and the white dots don't provide any help

(Posted on 7/17/14)

Great Review by Kool Jay

I bought my Visio Sound Bar to play my Playstation & Xbox games and the sound is off the hook. I also will use it on a regular basis to watch whatever on TV. Great product. I almost bought the LG Sound Bar which is $50-$60 dollars more but I took a chance on the Visio and I consider myself a winner. Again great product.

(Posted on 6/22/14)

Overall it's a fantastic pairing at a great price! Review by RichM

The bluetooth pairing is as simple as can be. The system offers enough power to easily fill any room. Has the ability to adjust bass and treble levels, which is nice, but could easily disappoint an audiophile that expects the same level of clarity of a system that sells for 4x the price. The sound is not very spacial. If you are directly in front of the soundbar, it comes through nice and clear. If you are seated to the side, it definitely feels 2-dimensional. The highs are not as high as some would like, but the lows and mids are pretty solid. Once again, if you're looking for clear separation between the lows, mids, and highs, then this is not for you. Personally, I consider it good enough and highly recommend for the price.

(Posted on 5/20/14)

Impressive Review by Bob

Paired this up with my Vizio 55 inch flat panel, sound is impressive, very easy set up, all at an affordable price.

(Posted on 5/16/14)


First let me qualify what I'm about to say. I'm a serious audiophile in fact I have spent up to 10K on a single high end car stereo. I got this sound bar today and hooked it up to my Vizio 55" Smart T.V. I then connected the sound bar to my iPhone 5 via bluetooth and hit play on iTunes and was I ever amazed. The performance of this sound bar for a total cost of under $$ is phenominal. Be sure to place the subwoofer in a corner and be prepared to hear excellent sound quality. I was so impressed with the quality of the sound while streaming via bluetooth that, I couldn't wait to have my cable installed before listening to the sound bar replace the television speakers. But, truly I felt there was no need to wait because even if the sound bar only performed half as well as television speaker replacements as it did streaming music from my iPhone 5 I would be totally happy and feel that I have gotten more value than I paid for because this sound bar rocks.

(Posted on 5/8/14)

Awesome sound!!! Review by Ant

I recently purchased a vizio sound bar 2.1 w/subwoofer it's esay to set up. The sound is clear & crisp with shattering bass. The sound bar pairs well w/my 55" Vizio M series. One of my best investments.

(Posted on 4/3/14)

Great Sound for a great price Review by Belle

I found this on Amazon after buying a Vizio TV. I wanted something that I didn't have to bother with a bunch of components and Voilà!!! I love this thing, you can definitely tell the difference.

(Posted on 2/20/14)

Awesome Review by Home Theater Geek

I bought this to go with my Vizio E401I-A2 40-inch 1080p 120hz LED Smart HDTV, and even though the TV's speakers aren't bad, this soundbar makes a night and day difference. The subwoofer gives a good clean deep sound and vibrates the floor without being obnoxious. The sound bar itself gives very clear and louder sound for it's size. My living room feels like I'm at the movie theater because of this 2.1 system. The other nice thing is that it gives me great audio without disturbing the neighbors in my apartment.

(Posted on 2/20/14)

Excellent Review by Hank

We have 2007 47" Vizio bought from Sam's Club that has been perfect all these years and great with the TiVo Series 4 Premiere DVR. Just got a Vizio Soundbar S3821w-CO from Costco and got tired of all the remotes so I had no choice but to try to train the TiVo remote and was successful except for echo. The sound echo was caused by the delay from the sound bar vs the TV direct speakers. After some frustrating and fruitless trial and errors I called Vizio customer support and Dalton in SLC took the time to understand the problem and solve it. He guided me to the Vizio Audio menu and I turned off the Vizio TV speakers and viola it works like a champ. The TiVo remote controls everything... the Vizio TV & Sound Bar, Cox cable and the TiVo itself. It's very hassle free to have one remote that works for everything. Thanks Vizio and TiVo but Cox still havs problems.
I should mention that the this wireless Soundbar provides great sound and the only shortfall was the white LEDs that don't tell you much but with the TV setup we have an on-screen analog bar indication of the volume control level and the Soundbar LEDs are redundant. Now to figure out which new HDTV to buy to get a repeat of our current satisfaction.

(Posted on 2/10/14)

GREAT Review by Ward B

I could not believe the difference!
The audio from any flat screen TV is hurtful, when compared with the sound from the sound bar!
My daughter had it, and when I heard it last month, I just had to get it!
We are very happy with it!

(Posted on 1/18/14)

WAS NOT ON THE LIST! Review by Leeleeg

WOW! Love my sound bar. Sounds great without the extra 5 speakers and the subwoofer even better, it bumps so loud for how small it is. Couldn't have made a better decision.

(Posted on 1/14/14)

Awesome Sound for the Money! Review by Gene

Just bought our second Vizio HDTV 70" monster. Wanted to upgrade old sound system.
I didn't have a lot of faith in the sound bar technology, but when I heard the display at Walmart I was blown away. Ok, so everything sound great at the store. Lets get it home and hooked up and see how it does. I could not believe the clarity and volume coming out of this bottom of the line sound bar. The sub delivers rich deep bass. I'm amazed at the quality of this product at just 160 bucks. Quick and easy setup. Just the touch of a button and I can play my music from my smart phone. Awesome job VIZIO!!!!

(Posted on 1/12/14)

Amazing!!! Review by Bgervais

The process in choosing the right sound bar and sub package was exhausting. Everyone made big promises but Vizio delivered. We recently finished a media room in our basement and the combination of the Vizio tv and the sound bar/sub is amazing. It is better than being at the movies. Great job Vizio.

(Posted on 12/30/13)

Excellent product for the money Review by k

I purchased this item because I needed an emergency music source for a family gathering out of town. When I listened to the display model in the store I was sure I had found the right item. It was easy to transport and too my delight and amazement the Vizio 38" sound bar and wireless subwoofer performed well above my expectations. The setup was simple and quick, the space needed was minimum, and the sound was delightful. I heard sound and instruments in my music selections that I had never heard before. Many family members questioned me about the unit and where they could purchase one. I am very pleased with this purchase and will be considering Vizio in future purchases. By the way, the unit was not attached to a TV. I used it as a stand alone music playback system.

Cons: A few times the subwoofer cut off for approximately10 seconds

(Posted on 12/26/13)

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