An affordable soundbar is always a good option to consider, so VIZIO SB3821-C6 vs Yamaha YAS-109 comparison definitely makes sense. Based on our rating, SB3821-C6 has a total rating of 4.5 out of 10 versus 6.8 for YAS-109. The competitors' control buttons are different: power, input, Bluetooth, volume down, volume up and power, volume down, volume up, input, microphone, respectively.
Both soundbars have active amplification type. A significant difference between the units in the number of channels, the VIZIO SB3821-C6 has 2.1 versus 2.0 for the Yamaha YAS-109. Only the Yamaha YAS-109 has a built-in subwoofer. The SB3821-C6 has a wireless connection to separate subwoofer, and the YAS-109 - wired and wireless. The VIZIO SB3821-C6 got our rating of 5 out of 10, and the Yamaha YAS-109 6 for its audio features and specs.
Soundbars do not have AirPlay support. Spotify support is available on the YAS-109.
Only the Yamaha YAS-109 can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Only the YAS-109 supports HDMI Audio Return Channel (ARC). Both soundbars have a USB connector. For connectivity, the SB3821-C6 received a rating of 6/10 versus 8/10, respectively. App control is available for the YAS-109. A built-in microphone is present only on the YAS-109. Soundbars do not have Multi-room support.
None of soundbars equipped with Dolby Atmos multichannel audio decoder. The soundbars do not support the surround sound technology DTS:X. For multichannel surround VIZIO SB3821-C6 got a rating of 5, and Yamaha YAS-109 6 out of 10.