Vizio V51-H6 vs Sony HT-S400 comparison definitely makes sense. Based on our rating, V51-H6 has a total rating of 6 out of 10 versus 4.4 for HT-S400.
Both soundbars have active amplification type. A significant difference between the units in the number of channels, the Vizio V51-H6 has 5.1 versus 2.1 for the Sony HT-S400. Competitors do not have a built-in subwoofer. The V51-H6 has a wired and wireless connection to separate subwoofer, and the HT-S400 - wireless. The Vizio V51-H6 got our rating of 7 out of 10, and the Sony HT-S400 6 for its audio features and specs.
Soundbars do not have AirPlay support. Spotify support not implemented in both soundbars.
Both models do not have WI-FI support. Rivals from our review have Bluetooth support. Each soundbar has 0/1 HDMI inputs/outputs. The HDMI Audio Return Channel (ARC) feature supports both devices. Both soundbars have a USB connector. For connectivity, the V51-H6 received a rating of 6/10 versus 7/10, respectively. App control is available for the V51-H6. A built-in microphone is present only on the V51-H6. 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, each of the opponents received 5 points out of 10.