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Vizio SB4021M-A1

 & Will Greenwald Principal Writer, Consumer Electronics

Our team tests, rates, and reviews more than 1,500 products each year to help you make better buying decisions and get more from technology.

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The Vizio SB4021M-A1 looks good and offers some rumble, but the soundbar itself just doesn't hold up very well playing anything that's not entirely bass. - Vizio SB4021M-A1
3.0 Average

The Bottom Line

The Vizio SB4021M-A1 looks good and offers some rumble, but the soundbar itself just doesn't hold up very well playing anything that's not entirely bass.

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Pros & Cons

    • Inexpensive.
    • Attractive design.
    • Disappointing midrange and treble.

Vizio SB4021M-A1 Specs

Channels 2.1

Soundbars with wireless subwoofers can certainly sound impressive, because that big 15-pound block you keep next to your couch can make the room shake without much effort. Because of this, when shopping for a system, it's easy to ignore the soundbar speaker itself, which gives you all of the audio above approximately 100Hz. Dialog, music, sound effects, and anything that isn't completely bass-driven suffers if the soundbar doesn't do its job. Unfortunately, the Vizio SB402M-A1 is proof of that. Its subwoofer is capable and its $229.99 (direct) price tag is right, but the soundbar just doesn't have enough depth or power to give the midrange and treble response enough impact.

Design

The soundbar itself is 40.1 inches wide and 4.1 inches high on its removable silver-colored feet, and measures only 2.1 inches deep. It weighs a svelte 4.8 pounds, and can easily be placed in front of your TV or mounted on a wall. The front is covered with a cloth grille interrupted in the middle by a glossy plastic rectangle with a silver Vizio logo and a blue LCD display. The ends are capped with silver-colored trim that give the soundbar a slightly more distinguished look. The top of the soundbar holds Power, Input, and Volume Up/Down buttons flush against a glossy plastic shell. The back holds the power port facing outward and a USB port, analog input, coaxial input, and optical input set facing right or down inside recessed areas, which are designed to make the ports accessible when the soundbar is mounted on a wall.

The wireless subwoofer is nondescript and black, measuring 12.8 by 8.5 by 11.3 inches (HWD) and weighing 10.9 pounds. The front, top, and back are black plastic, while the sides are covered in cloth grilles. A side-firing port sits on the back. It comes pre-paired with the soundbar, so all you have to do is plug it in, make sure it's within about 30 feet of the soundbar, and enjoy the bass.

The remote is large, chunky, and simple, measuring 4.4 inches long and 0.6 inches thick. It holds Power, Input, Mute, and Menu buttons, plus a direction pad that doubles as playback and volume control. The remote isn't backlit, but it's easy enough to use blindly.

Vizio SB4201M-A1

Final Thoughts

The Vizio SB4021M-A1 looks good and offers some rumble, but the soundbar itself just doesn't hold up very well playing anything that's not entirely bass. - Vizio SB4021M-A1

Vizio SB4021M-A1

3.0 Average

The Vizio SB4021M-A1 looks good and offers some rumble, but the soundbar itself just doesn't hold up very well playing anything that's not entirely bass.

Get It Now

Buy It Now

About Our Expert

Will Greenwald

Will Greenwald

Principal Writer, Consumer Electronics

My Experience

I’m PCMag’s home theater and AR/VR expert, and your go-to source of information and recommendations for game consoles and accessories, smart displays, smart glasses, smart speakers, soundbars, TVs, and VR headsets. I’m an ISF-certified TV calibrator and THX-certified home theater technician, I've served as a CES Innovation Awards judge, and while Bandai hasn’t officially certified me, I’m also proficient at building Gundam plastic models up to MG-class. I also enjoy genre fiction writing, and my urban fantasy novel, Alex Norton, Paranormal Technical Support, is currently available on Amazon.

The Technology I Use

Where to start? I have a standard IT-issued Lenovo Thinkpad for writing and editing, supplemented with an iPad Air and an 8Bitdo Retro Keyboard when I want to write on the go. I also have a Lenovo Legion Go as a platform for running Portrait Displays’ Calman software and controlling the Klein K-10A colorimeter, Murideo SIX-G signal generator, and Leo Bodnar 4K Video Signal Lag Tester I use for testing TVs. 

For gaming, I use a Nintendo Switch 2, PlayStation 5, and Xbox Series X, and a GeForce 5080-equipped MSI gaming laptop. I like collecting retro games as well, and have an Analogue Pocket and a ton of classic consoles and portables. Photography is another interest, and I use a Sony A7 IV when I’m shooting products and events, and a Fujifilm X-Pro3 for my own attempts at visual creativity. And for reading and writing, I’ve become partial to the Kobo Sage for books and the ReMarkable 2 with Type Folio.

When it comes to phones and tablets, I’m pretty platform-agnostic. I use a Google Pixel 8 for my phone and an iPad Air for a tablet. Android, iOS, and iPadOS are all totally fine, but I need a Windows PC. MacOS just isn’t for me.

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