LG GX vs VIZIO SB3651-F6 comparison definitely makes sense. Based on our rating, GX has a total rating of 6.5 out of 10 versus 6.8 for SB3651-F6. The competitors' control buttons are different: power, volume down, volume up, function and power, input, Bluetooth, volume down, volume up, respectively.
Both soundbars have active amplification type. A significant difference between the units in the number of channels, the LG GX has 3.1 versus 5.1 for the VIZIO SB3651-F6. Competitors do not have a built-in subwoofer. The GX has a wireless connection to separate subwoofer, and the SB3651-F6 - wired and wireless. The LG GX got our rating of 7 out of 10, and the VIZIO SB3651-F6 8 for its audio features and specs.
Soundbars do not have AirPlay support. Spotify support is available on the SB3651-F6.
Only the VIZIO SB3651-F6 can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. The LG GX has 1/1 HDMI inputs/outputs versus 1/0 of the VIZIO SB3651-F6. The HDMI Audio Return Channel (ARC) feature supports both devices. Both soundbars have a USB connector. For connectivity, each of the soundbars received a rating of 8/10.
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 VIZIO SB3651-F6 6 out of 10.