The Vizio V21-H8 vs LG SPD7Y comparison proves that these soundbars have many common features. Based on our rating, V21-H8 has a total rating of 5.5 out of 10 versus 5.6 for SPD7Y.
Both soundbars have active amplification type. A significant difference between the units in the number of channels, the Vizio V21-H8 has 2.1 versus 3.1.2 for the LG SPD7Y. Competitors do not have a built-in subwoofer. The V21-H8 has a wired and wireless connection to separate subwoofer, and the SPD7Y - wireless. The Vizio V21-H8 got our rating of 6 out of 10, and the LG SPD7Y 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. The Vizio V21-H8 has 0/1 HDMI inputs/outputs versus 1/1 of the LG SPD7Y. The HDMI Audio Return Channel (ARC) feature supports both devices. Both soundbars have a USB connector. For connectivity, the V21-H8 received a rating of 6/10 versus 7/10, respectively. App control is available for the V21-H8. A built-in microphone is present only on the V21-H8. 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 Vizio V21-H8 got a rating of 5, and LG SPD7Y 10 out of 10.