VIZIO M51ax-J6 vs Sony HT-S400 comparison definitely makes sense. Based on our rating, M51ax-J6 has a total rating of 5.4 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 M51ax-J6 has 5.1 versus 2.1 for the Sony HT-S400. Competitors do not have a built-in subwoofer. Rivals have wireless connection to separate subwoofer. The VIZIO M51ax-J6 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. The VIZIO M51ax-J6 has 1/1 HDMI inputs/outputs versus 0/1 of the Sony HT-S400. The HDMI Audio Return Channel (ARC) feature supports both devices. Both soundbars have a USB connector. For connectivity, the M51ax-J6 received a rating of 8/10 versus 7/10, respectively.
Compared soundbars have no app control. None of the models under consideration have a built-in microphone. Soundbars do not have Multi-room support.
Only the M51ax-J6 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the M51ax-J6. For multichannel surround VIZIO M51ax-J6 got a rating of 8, and Sony HT-S400 5 out of 10.