VIZIO SB3651-E6 vs Polk Audio SIGNA S2 comparison definitely makes sense. Based on our rating, SB3651-E6 has a total rating of 7.6 out of 10 versus 5 for SIGNA S2. The competitors' control buttons are different: power, input, Bluetooth, volume down, volume up and power, volume down, volume up, source, Bluetooth, respectively.
Both soundbars have active amplification type. A significant difference between the units in the number of channels, the VIZIO SB3651-E6 has 5.1 versus 2.1 for the Polk Audio SIGNA S2. Competitors do not have a built-in subwoofer. Rivals have wireless connection to separate subwoofer. The VIZIO SB3651-E6 got our rating of 7 out of 10, and the Polk Audio SIGNA S2 6 for its audio features and specs.
Each of rivals supports AirPlay. Spotify support is available on the SB3651-E6.
Only the VIZIO SB3651-E6 can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Each soundbar has 1/0 HDMI inputs/outputs. The HDMI Audio Return Channel (ARC) feature supports both devices. For connectivity, the SB3651-E6 received a rating of 8/10 versus 6/10, respectively. App control is available for the SB3651-E6. A built-in microphone is present only on the SB3651-E6. 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 4 points out of 10.