LG GX vs LG SLM4R comparison definitely makes sense. Based on our rating, GX has a total rating of 6.5 out of 10 versus 5.2 for SLM4R. The set of control buttons for competitors is the same and is: power, volume down, volume up, function.
Both soundbars have active amplification type. A significant difference between the units in the number of channels, the LG GX has 3.1 versus 4.1 for the LG SLM4R. The output power is identical and equal to 420 (overall) W. Competitors do not have a built-in subwoofer. Rivals have wireless connection to separate subwoofer. Both models received our 7 rating of 10 for their 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 GX supports HDMI Audio Return Channel (ARC). Both soundbars have a USB connector. For connectivity, the GX received a rating of 8/10 versus 6/10, respectively.
App control is available in every soundbar. None of the models under consideration have a built-in microphone. Soundbars do not have Multi-room support.
Only the GX has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the GX. For multichannel surround LG GX got a rating of 10, and LG SLM4R 5 out of 10.