It makes sense comparing Yamaha MusicCast BAR 400 vs LG SL9YG because they both are able to give some premium features. Based on our rating, MusicCast BAR 400 has a total rating of 8.2 out of 10 versus 8 for SL9YG. The competitors' control buttons are different: power, volume down, volume up, input, mute and power, volume down, volume up, play/pause, microphone, respectively.
Both soundbars have active amplification type. A significant difference between the units in the number of channels, the Yamaha MusicCast BAR 400 has 5.1 versus 4.1.2 for the LG SL9YG. The output power is different and equal to 200 (overall) W for the MusicCast BAR 400 versus 500 (overall) W for the SL9YG. Competitors do not have a built-in subwoofer. Rivals have wireless connection to separate subwoofer. The Yamaha MusicCast BAR 400 got our rating of 7 out of 10, and the LG SL9YG 8 for its audio features and specs. Spotify is available on each of the soundbars.
These models have the ability to connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Each soundbar has 1/1 HDMI inputs/outputs. The HDMI Audio Return Channel (ARC) feature supports both devices. Both soundbars have a USB connector. For connectivity, the MusicCast BAR 400 received a rating of 8/10 versus 7/10, respectively.
App control is available for the SL9YG. A built-in microphone is present in each model. Multi-room is available to every soundbar.
Only the SL9YG has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the SL9YG. For multichannel surround Yamaha MusicCast BAR 400 got a rating of 6, and LG SL9YG 8 out of 10.