LG SP2 vs LG SLM4R comparison definitely makes sense. Based on our rating, SP2 has a total rating of 4.2 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 SP2 has 2.1 versus 4.1 for the LG SLM4R. The output power is different and equal to 100 (overall) W for the SP2 versus 420 (overall) W for the SLM4R. Only the LG SP2 has a built-in subwoofer. The LG SP2 got our rating of 5 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 SP2 supports HDMI Audio Return Channel (ARC). Both soundbars have a USB connector. For connectivity, the SP2 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.
None of soundbars equipped with Dolby Atmos multichannel audio decoder. The soundbars do not support the surround sound technology DTS:X. For multichannel surround, each of the opponents received 5 points out of 10.