Compare detailed specifications, side-by-side differences, verified user reviews, and buying recommendations to help you make the right choice.
Deciding between the VIZIO SB3821-C6 and the VIZIO SB3820-C6 depends on your available space, storage capacity goals, and everyday usage style:
Designed for large households, bulk grocery shoppers, and long-term storage where total cubic feet is the highest priority.
Ideal for apartments, offices, dorms, or secondary kitchen use where space efficiency and neat organization are paramount.
VIZIO SB3820-C6 has very crisp and nice balanced upper and midrange, there is no need to deal with those levels.
This soundbar is compatible with a subwoofer. It has several ways to connect to your TV (optical, RCA, orange cord). You can connect to it
Read More| Specification | VIZIO SB3821-C6 | VIZIO SB3820-C6 |
|---|---|---|
| Connectivity | ||
| Ethernet (RJ45) | No | No |
| Bluetooth | Yes | Yes |
| Headphone Output | No | No |
| WI-FI | No | No |
| Analog Audio Input/output (RCA) | 1/0 | 1/0 |
| Coaxial Digital Input/output | 1/0 | 1/0 |
| USB | 1 | 1 |
| Optical Digital Input/output | 1 | 1 |
| HDMI ARC | No | No |
| HDMI Input/output | No | No |
| Features | ||
| VOICE CONTROL | No | No |
| Multi-room | No | No |
| REMOTE CONTROL | Yes | Yes |
| Microphone | No | No |
| APP CONTROL | — | Yes |
| Dimensions | ||
| Weight, Kg/pounds | 2.6/5.8 | 2.6/5.7 |
| Size (H X W X D), Cm/in | 7.6 x 96.5 x 7.6/3 x 38 x 3 | 7.6 x 96.7 x 7.6/3 x 38.1 x 3 |
| General | ||
| Soundbar Buttons | power, input, Bluetooth, volume down, volume up | power, input, Bluetooth, volume down, volume up |
| Connection To Source | wired, wireless | wired, wireless |
| Placement Type | table-top, wall-mountable | table-top, wall-mountable |
| Subwoofer | ||
| Separate Subwoofer Connections | wireless | No |
| Separate Subwoofer (in Package) | 1 | No |
| Built-in Subwoofer | No | No |
| Multichannel Surround | ||
| DTS:X | No | No |
| Dolby Atmos | No | No |
| Streaming Services | ||
| Other Streaming Services | has not | VIZIO SmartCast |
| Spotify | No | No |
| Amazon Music | No | No |
| Google Play Music | No | No |
| Apple Music (AirPlay) | No | No |
| Audio Features | ||
| Separate Speaker Connections | No | No |
| Separate Speaker (in Package) | No | No |
| Supported Channel Quantity | 2.1 | 2.0 |
| Built-in Channels | 2.1 | 2.0 |
| Amplification Type | active | active |
The main differences center around storage capacity, form factor, and convenience. The VIZIO SB3821-C6 provides extensive bulk storage capacity best suited for homes, garages, or basements needing deep freeze space. In contrast, the VIZIO SB3820-C6 offers a compact upright design that fits into smaller spaces with convenient shelf organization.
Chest-style freezers generally excel in thermal efficiency because cold air naturally settles at the bottom and does not escape when the lid is lifted. Compact upright models have lower total kilowatt-hour usage simply due to their smaller cubic volume, making both designs efficient for their respective intended purposes.
Both products are available through official brand stores and authorized retailers with full manufacturer warranties and fast delivery options. Click the "Check Best Price" buttons in the comparison cards above to view today's latest promotions, official deals, and current availability.
Measure your available floor clearance first. If you have open space in a garage, basement, or utility room and want to freeze items in bulk, choose the VIZIO SB3821-C6. If you have limited room in a kitchen, apartment, dorm, or office and prefer easy eye-level access to items, choose the VIZIO SB3820-C6.
