Polk Audio Signa S4 vs LG SLM4R comparison definitely makes sense. Based on our rating, Signa S4 has a total rating of 7.8 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 Polk Audio Signa S4 has 3.1.2 versus 4.1 for the LG SLM4R. The output power is different and equal to 80 (overall) W for the Signa S4 versus 420 (overall) W for the SLM4R. Competitors do not have a built-in subwoofer. Rivals have wireless connection to separate subwoofer. The Polk Audio Signa S4 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 Signa S4.
Only the Polk Audio Signa S4 can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Only the Signa S4 supports HDMI Audio Return Channel (ARC). Both soundbars have a USB connector. For connectivity, each of the soundbars received a rating of 6/10.
App control is available in every soundbar. A built-in microphone is present only on the Signa S4. Soundbars do not have Multi-room support.
Only the Signa S4 has a Dolby Atmos multichannel audio format support. The soundbars do not support the surround sound technology DTS:X. For multichannel surround Polk Audio Signa S4 got a rating of 9, and LG SLM4R 5 out of 10.