Sonos Arc vs LG SLM4R comparison definitely makes sense. Based on our rating, Arc has a total rating of 7 out of 10 versus 5.2 for SLM4R. The competitors' control buttons are different: volume down, volume up, play/pause, microphone and power, volume down, volume up, function, respectively.
Both soundbars have active amplification type. Competitors do not have a built-in subwoofer. Rivals have wireless connection to separate subwoofer. The Sonos Arc got our rating of 5 out of 10, and the LG SLM4R 7 for its audio features and specs. Spotify support is available on the Arc.
Only the Sonos Arc can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Only the Arc supports HDMI Audio Return Channel (ARC). For connectivity, the Arc received a rating of 7/10 versus 6/10, respectively. App control is available in every soundbar. A built-in microphone is present only on the Arc. Soundbars do not have Multi-room support.
Only the Arc has a Dolby Atmos multichannel audio format support. The soundbars do not support the surround sound technology DTS:X. For multichannel surround Sonos Arc got a rating of 4, and LG SLM4R 5 out of 10.