VIZIO SB3821-C6 review! Is it a good soundbar?

Who doesn’t want to have some exciting sound system in their houses? An ideal soundbar will provide enough room-filling quality and come with a reasonable price. This VIZIO SB3821 C6 review will be focusing on the features and quality as well as our opinion on one of the best soundbar systems.

About VIZIO SB3821-C6, 38-inch 2.1 channel soundbar

This is a soundbar system that owns some incredible qualities and built-in effects, which ensures that it will enhance your listening experience. Having this product, you will be able to transform your TV into a cool home theater entertainment system. This VIZIO SB3821-C6 review will explain to you why this soundbar speaker system can be able to fill your house with high-quality audio sound, as well as why it is recommended as a good option for a budget system.


If you have used the SB3851-C0 and think it is the best of VIZIO’s soundbar speaker system, you will be amazed at the quality that the VIZIO SB3821-C6 brings. That is also the reason why it has been voted to be the top-selling sound system on most e-commerce websites. In addition to that, you need to spend under $300 to enjoy yourself with an audio system that has the best sound technology. VIZIO SB3821-C6 is a perfect option that not only provides the best audio experience but also saves you some money.

VIZIO SB3821-C6 is a good budget soundbar speaker system

VIZIO SB3821-C6 is a good budget soundbar speaker system

Our VIZIO SB3821-C6 review will give you details about this product. With the main soundbar and a potent wireless subwoofer, your TV audio quality can be transformed to a whole new system. The 5″ wireless subwoofer allows you to enjoy quality audio from your TV set. In addition, you can use the robust Bluetooth connectivity to play music from your smartphone or any other wireless audio source.

Apart from the wireless subwoofer, there also are new high-tech aesthetics of this excellent soundbar that are designed to match with your VIZIO TV set. They are built into the speaker system perfectly, including the DTS TruVolume, the Dolby Digital Sound and DTS TruSurround.

These features are designed to upgrade your TV audio entertainment and enhance your entertainment experience with your TV. This high-tech soundbar speaker system includes two alkaline batteries, a power cable,  a composite cable, and a quick start guide manual.

VIZIO SB3821-C6 soundbar with wireless subwoofer

VIZIO SB3821-C6 soundbar with wireless subwoofer

Not only does the VIZIO SB3821-C6 allow you to play audio sounds from wirelessly connected sources, but it also offers external connectivity of devices with its USB port and a 3.5mm audio jack, digital optical, coaxial inputs, and stereo RCA. The USB port comes with digital optical and digital coaxial cords for RCA to the 3.5mm connectivity, so you can apply the WAV audio format’s playback. This high-standard soundbar also includes a simple remote control for simplified operation. Aside from that, you can install with tabletop placement capabilities and wall-mountable features easily and simply with the mounting hardware included.

SB3821-C6 Build and design

This VIZIO SB3821 C6 is very well built by the look and the feel. Some audio equipment is designed and manufactured to get attention. This one is very simple and has an easy on the eye design. It has no flamboyance or outrageous angles. This VIZIO SB3821-C6 is a smart piece of audio equipment that sits in the category of having a simple design.

While most soundbars are manufactured from cheap plastic to reduce the costs, the VIZIO has added some other features, including a black grille and black panels. Although it has a plastic body, the end sections are made with a brushed aluminum texture. The measurement of the soundbar is 38 by 3 by 3 inches and its weight is just under six pounds. You can find controls on recessed sections on the rear which is a little awkward.

VIZIO SB3821-C6 has a simple design

VIZIO SB3821-C6 has a simple design

In addition, the subwoofer cabinet is also built very well. It is ported and has a five-inch woofer with fifteen inches height. The port is made from solid wood, not a fiberboard or something similar, giving roundness to the bass sound. It is quite a surprise given the price point of the soundbar.

Moreover, this VIZIO SB3821-C6 has a sleek and attractive look. Although it is not the nicest soundbar design on the market, it does have good design points. This soundbar is just an uncomplicated product with the black design and the aluminum ends.

This soundbar is a good choice for you with good and stable build quality and effective design, along with installation options. It will be easy for you to install it on the wall or to place it on the table. In addition, you will not have any trouble with cable ties to make your room neat from wires thanks to the wireless subwoofer.

SB3821-C6 Sound quality

This VIZIO soundbar system offers an impressive 100dB of quality sound. If your room has an average size, it will be filled with only one percent of harmonic distortion. The soundbar can handle the mid and high frequencies well thanks to the two 2,75” drivers. Also, the 5-inch subwoofer offers the lower ranges, which is a great combination to produce a good sound.

VIZIO SB3821-C6 a good quality of sound

VIZIO SB3821-C6 a good quality of sound

In particular, the two drivers in the soundbar project the mid and high frequencies, so that they produce a good quality of sound. When it comes to the bass, the subwoofer is there to provide deep bass. It is good for movies. However, it is quite small so you can’t expect it to be great. There is a port in the cabinet, and the speaker can do a frequency bottom end of 50Hz. It doesn’t mean that there is no bass at all, but it is lacking. If you use it for music, it will be better. It provides a good quality of sound, however, it is a budget system after all, so you cannot expect top of the range bass sound.

Thanks to the Dolby System which is the recognized audio standard, everything is sparkling clean. Space is given to the sound by the surround sound effect, so you can find that the sound has a nice warmth.

In addition, the DTS Trusound, which is a multi-channel format that takes a 5.1 audio signal will create the surround sound experience. The volume just needs to be set once, and you can enjoy a comfortable listening level throughout the movie. It is certain that the sound will be a hundred times better than your TV sound. This soundbar is a very good option for a budget system. As you look for other soundbar systems to compete with this VIZIO SB3821-C6, it is hard to find one. With its price range, this soundbar has the best performance.

The controls and performance

As we mentioned above in this VIZIO SB3821-C6 review, the controls are situated on the rear of the soundbar. As the soundbar is only three inches in height, the controls have a tricky position because you don’t have much space and they are recessed in the back. It will be awkward no matter where you put it, on the floor or on the wall.

You don’t have to worry about the controls of VIZIO SB3821-C6

You don’t have to worry about the controls

However, a good thing is that it comes with remote control, so the design is quite reasonable. But it just means that the system will not be used manually in an easy way. On the other hand, it is easy to use the controls themselves. They are designed with a 3.5 socket and a USB in, along with optical and coaxial inputs that connect the speaker to its source. In general, you don’t have to worry too much about the controls as they are basic. You can always use the remote control which is handy.

The next thing we will mention in this VIZIO SB3821-C6 review is the performance. When it comes to this price point, it is very good. It can be below standard if you compare it to a thousand dollars soundbar system. Also, do not expect that it will produce a real deep bass and top quality mids and highs for this price.

It will produce 100dB of a clear sound that has a low distortion level. The only downside of this system is that it can’t produce a thundering bass. But it doesn’t really matter if you are just playing music.

VIZIO SB3821-C6 Connectivity

It has good connections between the soundbar and wireless woofer. As long as you don’t place them too far from each other, you will not have any proximity problems. You can distance up to about 30 feet, but a line of sight will be needed to the soundbar.

The system comes with built-in Bluetooth so you can transfer files to and from your devices, including phones, laptops, and tablets with Bluetooth compatibility, along with some external connection options. However, it doesn’t support the HDMI connection.

VIZIO SB3821-C6 Soundbar features:

In this part of the VIZIO SB3821-C6 review, we will mention its features. And here are they:

The Wireless Subwoofer

The VIZIO SB3821-C6’s subwoofer is wireless and free of cables, so you can place this 5″ subwoofer system in any corner of your house. And it will still fill the room with high-quality sound perfectly. This soundbar also produces a rich and powerful sound that will for sure enhance your music, television and movie experience. One of the most useful features is that it is wireless so you don’t have to use any devices like cable ties in your room, which will make your room so neat.

The DTS TruVolume

The system will enhance your listening experience

The system will enhance your listening experience

This feature is designed so that you can set the system volume just once. It has the ability to provide all your audio devices a consistent volume level. This DTS TruVolume will improve your listening experience by offering the comfort that it is hard to find from any other soundbar. With that being said, you don’t have to adjust the volume levels even during commercials.

The DTS TruSurround

TruSurround will offer immersive and realistic surround sound on soundbars virtually. This design of DTS TruSurround will provide the highly detailed surround audio and it doesn’t need the support of any additional satellite speakers.

The Dolby Digital

Thanks to this Dolby Digital feature, your TV will be transferred into a home theater system. It is an audio standard for Broadcast, Cinema, Blu-ray, DVD and content streaming. Dolby Digital has the ability to give a dramatic dimension to soundtracks. It also provides enhanced audio definition, which will offer you the best audio listening experience.

Some other features

Aside from all the advanced features mentioned above, this VIZIO SB3821-C6 also produces expansive audio of up to 100db. Along with the ability to fill the room with quality sounds, this soundbar is one of the best options compared to other speaker systems. You will be able to enjoy the crystal clear sound thanks to harmonic distortion of one percent and below.

Pros and cons of the VIZIO SB3821-C6 soundbar system

Everything has its advantages and downfalls. So there is no surprise that this digital product will be the same. In this VIZIO SB3821-C6 review, we will mention all the positive and the negative sides of the soundbar speaker system.


  • With its price, what it delivers is spectacular 
  • It can produce excellent quality of sound
  • It allows you to stream from devices and other wireless audio sources through the Bluetooth connectivity
  • The 5″ wireless subwoofer is not something you expect from a budget system
  • The sleek and simple design makes it easy to install
  • It has both analog and digital connectivity ports
  • It is the best upgrade to better audio listening experience from your TV speakers.


  • There is no HDMI connection
  • The wireless subwoofer connection has a short-range
  • It will be a disconnect when gaming



In conclusion, the VIZIO SB3821-C6 Sound Bar system will fill your house with the best immersive and offer you a high-quality sound experience. Whether you are listening to music or watching a movie, you can enjoy the ultimate listening experience from your TV set. This speaker system produces the crystal clear sound which will make you enjoy the movie or music even more.