LG S75QR vs Sony HT-S400 comparison definitely makes sense. Based on our rating, S75QR has a total rating of 5.5 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 LG S75QR has 5.1.2 versus 2.1 for the Sony HT-S400. The output power is different and equal to 450 (overall) W for the S75QR versus 330 (overall) W for the HT-S400. Competitors do not have a built-in subwoofer. Rivals have wireless connection to separate subwoofer. The LG S75QR 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 not implemented in both soundbars.
Both models do not have WI-FI support. Rivals from our review have Bluetooth support. The LG S75QR 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, each of the soundbars received a rating of 7/10.
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 S75QR has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the S75QR. For multichannel surround LG S75QR got a rating of 6, and Sony HT-S400 5 out of 10.