Choosing a soundbar is not an easy task and the LG GX vs Vizio V21-H8 comparison is meant to help you with that. As a result, it is clear that GX is much better designed and has a better sound performance than V21-H8. According to the results of our comparison, GX received 6.5 points out of 10 possible, and V21-H8 was rated 5.5 points.
The GX is rated 7 of 10 against 6 for the V21-H8 according to the audio features rating.
It worth understanding the difference between the two types of amplification: a passive soundbar does not have its own amplifier and receives amplification from the signal source, while an active soundbar has a built-in amplifier. The same active type of amplification is used in the GX and the V21-H8.
There are stereo soundbars and multichannel ones. It is with the help of multichannel devices that you can get volumetric sound. It is worth noting one of the main differences, the GX has 3.1 channels, while the V21-H8 has 2.1 channels.
|Output power, W||420 (overall)||N/A|
|Separate speaker (in package)||0||0|
|Separate speaker connections||wireless||wired, wireless|
Soundbars can have a built-in or external subwoofer. The first type is inseparable from the soundbar body, but for the second, you can choose a good location for deep bass. Both reviewed devices are equipped with an external subwoofer. LG GX has the ability to handle wireless connections from an external subwoofer, while Vizio V21-H8 only has wired and wireless connections.
|Separate subwoofer (in package)||✔||✔|
|Separate subwoofer connections||wireless||wired, wireless|
Unlike stereo, when reproducing multichannel sound, each specific direction of sound corresponds to its dedicated channel with a separate independent loudspeaker, which creates a three-dimensional sound stage. The GX received rating 10 out of 10 for multichannel audio processing, but the V21-H8, in the same category, earned 5 out of 10 points.
The peculiarity of Dolby Atmos is that this format is object-oriented, that is, each object of the audio signal is sounded separately and linked to its spatial location. Dolby Atmos surround sound support is implemented only in LG GX.
DTS:X is an algorithm for processing sound scenes by the processor, linking directly to objects, rather than channels, and calculating the optimal distribution of sound output in a room. The manufacturer has implemented DTS:X technology only in GX.
|Dolby (other)||Dolby Digital, Dolby Digital Plus||Dolby Digital|
|DTS (other)||DTS HD, DTS Digital Surround||DTS Virtual:X|
The possibility to listen online to millions of songs from one device has become a reality thanks to streaming services.
None of the two models is not implemented AirPlay function. The popular Spotify service cannot be used on both soundbars.
|Apple Music (AirPlay)||✖||✖|
|Other streaming services||has not||has not|
The existence of a sufficient number of current connectors significantly expands the functionality of the device. For example, only through HDMI is it possible to implement the transfer of object-oriented formats, and the presence of a Bluetooth connection will allow remote control, etc. The devices received different ratings for connectivity: LG GX was rated 8 out of 10, and Vizio V21-H8 was rated 6 out of 10.
The presence of Wi-Fi in the soundbar allows you to get rid of wires when connected to a sound source and get minimal audio latency when playing content from streaming services. Such connection as via Wi-Fi is not possible on any of the devices in comparison.
Bluetooth connection is now one of the main communication protocols for speaker systems, which provides excellent quality and minimal audio latency. The availability of Bluetooth protocol, we can see in both models. The GX has 1/1 HDMI inputs/outputs, but the V21-H8 got 0/1 HDMI inputs/outputs from the manufacturer.
HDMI ARC is a very usefull technology that creates a two-way communication channel between a TV and another device. This is convenient since there is no need to use optical and other cables in the system. HDMI ARC is basic for both soundbars. Connecting external devices via USB can be done on both models.
|Optical digital input/output||1/0||1/0|
|USB||1 (USB 2.0)||1 (USB 2.0)|
|Coaxial digital input/output||0/0||0/0|
|Analog audio input/output (RCA)||0/0||1/0|
Voice control is designed to make operating the device more convenient. This allows you to control basic soundbar functions from anywhere in the room.
Proprietary applications allow you to control your soundbars remotely. This is possible both via Bluetooth and Wi-Fi. The ability to control the soundbar using the application is implemented in each of the competitors. Only Vizio V21-H8 has a built-in microphone.
Some soundbars can be part of a multi-room system and it is an affordable solution for sounding the whole house. However, it is impossible to create a multiroom system based on each of these soundbars.
|Voice control||✖||Amazon Alexa, Google Assistant, Siri|
|Size (Wx H x D), cm/in||142 x 12.7 x 2.5/56.9 x 5.9 x 1.3||100 x 27.4 x 37.6/39 x 11 x 15|