Does it support Dolby Atmos?

No. It decodes Dolby Digital only, so Atmos and DTS:X tracks play in a standard surround mix.

Can I connect it with HDMI?

No. It uses optical, coaxial and analog inputs, plus Bluetooth, so you connect the TV by optical or analog.

Do the rear speakers need wires?

Yes. The satellite speakers are wired to the wireless subwoofer, which needs a power outlet.

Can I stream music from my phone?

Yes. Bluetooth lets you play audio from phones, tablets and other Bluetooth devices.

The sound bar, wireless subwoofer, two satellite speakers, remote, cables and power cords.

Is it good for a large room?

It suits small to mid-size rooms. In large or open spaces the 38-inch bar and modest sub can struggle to fill the room.

What do buyers say about the VIZIO 38" 5.1 Sound Bar, Dolby Digital, Bluetooth, SB3851-C0?

Rated 4.4 out of 5 from 175 ratings.

VIZIO 38" 5.1 Sound Bar, Dolby Digital, Bluetooth, SB3851-C0

Best price now

$320.00at WalmartChecked 22 min ago

Prices are checked against each store and labelled with when.

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VIZIO 38" 5.1 Sound Bar, Dolby Digital, Bluetooth, SB3851-C0

Best price now

$320.00at WalmartChecked 22 min ago

Prices are checked against each store and labelled with when.

Visit Walmart

Ask our agent about this product

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Price facts

Lowest price today: $320.00 at Walmart (checked Nov 15, 2026).

Our take on the VIZIO 38" 5.1 Sound Bar, Dolby Digital, Bluetooth, SB3851-C0

The VIZIO SB3851-C0 is a 38-inch 5.1-channel sound bar system with a wireless subwoofer and two satellite speakers for true surround sound. It supports Dolby Digital and Bluetooth, so it handles TV audio and phone streaming without extra gear. It suits small to mid-size rooms where a full AV receiver setup is too much. Against single-bar rivals it adds real rear channels and a separate sub, but it lacks HDMI and modern formats like Dolby Atmos.

Best forSmall to mid-size living roomsBuyers wanting real surround on a budgetMovie and TV watchingStreaming music from a phone

Pros

True 5.1 with rear satellite speakers
Wireless subwoofer keeps wiring simple
Bluetooth streaming from phones and tablets
Dolby Digital decoding for TV and movie audio
Simple setup for a surround system

Cons

No HDMI input or ARC
No Dolby Atmos or newer object-based formats
Satellite speakers need power outlets and wiring to the sub
Bass can overpower dialogue at high volume
Remote is basic and the display is small

VIZIO 38" 5.1 Sound Bar, Dolby Digital, Bluetooth, SB3851-C0 prices at every store

WalmartNew
In stockSold by SPick IncReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$320.00Free shippingChecked 22 min ago
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What reviewers say

4.4 / 5175 ratings

Owners rate it well for the surround effect and value, calling it a big step up from TV speakers. Complaints center on the lack of HDMI, boomy bass and occasional Bluetooth or subwoofer connection hiccups.

What people mention

Surround soundPraisedOwners say the rear satellites create a convincing surround effect for movies.
SetupPraisedBuyers report the subwoofer pairs wirelessly and the system is quick to set up.
BassMixedThe subwoofer adds weight, but some find it boomy and muddy at higher volumes.
ConnectivityCriticisedReviewers miss an HDMI input and rely on optical or analog connections.
BluetoothMixedStreaming works, though a few owners report dropouts and re-pairing.
Dialogue clarityCriticisedSome say speech gets lost under the bass and needs volume tweaking.

About the VIZIO 38" 5.1 Sound Bar, Dolby Digital, Bluetooth, SB3851-C0

This VIZIO sound bar is a 38-inch, 5.1 channel system. It comes with a wireless subwoofer and satellite speakers.

It supports Dolby Digital and has Bluetooth.

Brand: VIZIO
Model: SB3851-C0
Channels: 5.1
Bar length: 38 inches
Color: Black
Size: 2.75 in
Audio format: Dolby Digital
Connectivity: Bluetooth
In the box: Sound bar, wireless subwoofer, satellite speakers

Specifications

color: BlackSource
size: 2.75\"Source

Questions and answers

Does it support Dolby Atmos?: No. It decodes Dolby Digital only, so Atmos and DTS:X tracks play in a standard surround mix.
Can I connect it with HDMI?: No. It uses optical, coaxial and analog inputs, plus Bluetooth, so you connect the TV by optical or analog.
Do the rear speakers need wires?: Yes. The satellite speakers are wired to the wireless subwoofer, which needs a power outlet.
Can I stream music from my phone?: Yes. Bluetooth lets you play audio from phones, tablets and other Bluetooth devices.
What is in the box?: The sound bar, wireless subwoofer, two satellite speakers, remote, cables and power cords.
Is it good for a large room?: It suits small to mid-size rooms. In large or open spaces the 38-inch bar and modest sub can struggle to fill the room.
Where is the VIZIO 38" 5.1 Sound Bar, Dolby Digital, Bluetooth, SB3851-C0 cheapest?: At Walmart, for $320.00, as of our latest check.
What do buyers say about the VIZIO 38" 5.1 Sound Bar, Dolby Digital, Bluetooth, SB3851-C0?: Rated 4.4 out of 5 from 175 ratings.