Samsung HW-Q900T vs Sony HT-S400 comparison definitely makes sense. Based on our rating, HW-Q900T has a total rating of 8.2 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 Samsung HW-Q900T has 7.1.2 versus 2.1 for the Sony HT-S400. The output power is different and equal to 406 (overall) W for the HW-Q900T versus 330 (overall) W for the HT-S400. Competitors do not have a built-in subwoofer. Rivals have wireless connection to separate subwoofer. The Samsung HW-Q900T got our rating of 8 out of 10, and the Sony HT-S400 6 for its audio features and specs.
Soundbars do not have AirPlay support. Spotify support is available on the HW-Q900T.
Only the Samsung HW-Q900T can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. The Samsung HW-Q900T has 2/1 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 HW-Q900T received a rating of 8/10 versus 7/10, respectively. App control is available for the HW-Q900T. A built-in microphone is present only on the HW-Q900T. Multi-room is only available for the Samsung HW-Q900T.
Only the HW-Q900T has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the HW-Q900T. For multichannel surround Samsung HW-Q900T got a rating of 9, and Sony HT-S400 5 out of 10.