LG S75QR vs LG SLM4R comparison definitely makes sense. Based on our rating, S75QR has a total rating of 5.5 out of 10 versus 5.2 for SLM4R. The competitors' control buttons are different: power, source, demo, volume down, volume up and power, volume down, volume up, function, respectively.
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 4.1 for the LG SLM4R. The output power is different and equal to 450 (overall) W for the S75QR versus 420 (overall) W for the SLM4R. 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 LG SLM4R 7 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. Only the S75QR supports HDMI Audio Return Channel (ARC). Both soundbars have a USB connector. For connectivity, the S75QR received a rating of 7/10 versus 6/10, respectively.
App control is available for the SLM4R. 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 LG SLM4R 5 out of 10.