LG SPD7Y vs LG SLM4R comparison definitely makes sense. Based on our rating, SPD7Y has a total rating of 5.6 out of 10 versus 5.2 for SLM4R.
Both soundbars have active amplification type. A significant difference between the units in the number of channels, the LG SPD7Y has 3.1.2 versus 4.1 for the LG SLM4R. The output power is different and equal to 380 (overall) W for the SPD7Y versus 420 (overall) W for the SLM4R. 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 SPD7Y supports HDMI Audio Return Channel (ARC). Both soundbars have a USB connector. For connectivity, the SPD7Y 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 SPD7Y has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the SPD7Y. For multichannel surround LG SPD7Y got a rating of 10, and LG SLM4R 5 out of 10.