Vizio M-Series 5.1 M51a-H6
(Image Credit:

The M-Series 5.1 M51a-H6 speaker from Vizio comes at a very reasonable price, with great surround sound, but it lacks some important details.

Fast Talk

Vizio’s M-Series 5.1 Soundbar is like a home theater, it comes with Dolby Atmos and DTS: X M51a-H6.

It is a speaker system with a long name and a longer list of features, the M-Series 5.1 M51a-H6 has a subwoofer and satellite speakers, providing you with true 5.1 surround sound.

It also supports Dolby Atmos and DTS Virtual: X for the latest immersive sound; And it comes with many ways to tune the sound that you hear.

But while this woofer challenges the best amplifiers in absolute terms, it needs some important experimentation with the options before realizing their potential.


  • True surround sound with Atmos support
  • Lots of audio and input options
  • Affordable


  • Bass lacks detail
  • It takes work to get the right sound
  • No upfiring amplifiers


This Vizio M-Series 5.1 M51a-H6 Speaker is one of the cheapest speaker / subwoofer / satellite combinations we have tested so far, it comes at only $ 250. This is a big drop in relation to the prices in the market.

M-Series 5.1 M51a-H6 Design: Elegant , A Lot of Useful Ports

The Vizio M-Series 5.1 M51a-H6 Speaker has a very elegant design with rounded edges and a minimalist charcoal color.

The main speakers measure 36 x 3.5 x 2 inches with 6 drivers, all facing forward, no drivers higher for height.

The wireless subwoofer measures about 11.8 x 9 x 8.4 inches and has a 6 inch woofer inside.

The subsection has wired outputs for left and right satellites each containing approximately 5.8 x 3.5 x 2.3 inches.

Vizio M-Series 5.1 M51a-H6 soundbar design
(Image Credit:

And the top of the Vizio M-Series 5.1 M51a-H6 has all of the power, input, Bluetooth pairing, and volume controls.

There are LED lights on the front left side, volume level, and different groups of lights also flash when changing the inputs or when changing sound modes, for example a green light appears when playing Dolby Atmos.

The ports are located on the back, where there is an HDMI Out port to connect to the TV, an HDMI In port for external devices such as a broadcast box, and there is an optical digital audio input, a USB input and two auxiliary 3.5 mm inputs.

Vizio M-Series 5.1 M51a-H6 soundbar ports

There is also a dedicated aux input for connecting a TV and another, called Aux VA, to a voice assistant amplifier, and it is active when switching to other inputs, allowing permanent access to the audio assistant.

As for the remote control, it is very cool and does a lot of heavy lifting, and it has a small screen at the top that displays options when selected, the screen is easy to read and the navigation options are fairly easy.

Vizio M-Series 5.1 M51a-H6 remote control

Recommended: Sonos Arc vs Sonos Beam: Which is better for you

M-Series 5.1 M51a-H6: Easy Setup

As for setup, the Vizio M-Series 5.1 M51a-H6 Speaker offers two different ways to arrange the speakers, satellites, and subwoofer.

The placement has speakers underneath the TV and satellites behind you and sub next to where you sit, so you can connect the satellites to the submarine via wires, this arrangement keeps the cables out of your way.

You can also put satellites on top with the speakers, and place the subsection next to the TV, but you can switch the satellite order in the remote control setup menu.

You can use an HDMI cable to connect the HDMI output of the amplifier to the eARC HDMI port of my TV, this connection will allow you to use the TV remote control to control the volume

There is also a lot of additional adjustments that you can make to the sound such as equalizer options for movies, music, live and games; You can also change the level of the center, subwoofer, and satellite channels manually.

Recommended: Samsung HW-Q70R Soundbar Review

M-Series 5.1 M51a-H6: Great Performance for The Price

In terms of performance, the M-Series 5.1 M51a-H6 speaker provides superb surround sound quality, the presence of satellite speakers on the M51a-H6 enhances the immersive experience of watching a movie or playing a game.

The Vizio M-Series 5.1 M51a-V6 offers Dolby Atmos and DTS: X support providing a more refined effect as well.

Upon testing, we watch Avengers: Infinity War, so the sound was moving through space thanks to its surround speakers, but we Find that the M51a-H6 lacks rising speakers, so you miss the levitation effect when Thor lowers the lightning.

The Vizio M-Series 5.1 M51a-H6 is a touchscreen speaker, but depending on how the speaker is set up the low end can totally overwhelm everything else. Since we noticed that the sound from the subwoofer lacks any definition, we tried to improve the effect by moving the subwoofer and lowering the level, but that did not change the details emerging from the sub device.

And for the subwoofer under control, the sounds were full and ringing, and we found the conversations between Malcolm X, Cassius Clay, Sam Cook and Jim Brown in One Night in Miami to be very impressive.

As for the music, it was full and bright. When The Weeknd sang “Bright Lights”, it was full and warm while the bass sound was pleasant; And when using live mode as stereo rather than surround, the sounds and instruments are flat, with only the bass remaining impressive.

Overall, however, the Vizio M-Series 5.1 M51a-H6 is an extremely powerful amplifier, pushing out more than 100dB at full size, and it looked relatively clean even at 90dB.

Recommended: Yamaha YAS-108 Review


In the end, the M-Series 5.1 M51a-H6 speaker provides true 5.1 surround sound, it comes at a similar price to speakers that must use virtual surround sound to try to achieve the effect. It has a great deal of flexibility, it has a true 5.1 surround sound with Atmos.

There are many other great speakers out there, like the Yamaha YAS-209 or Sonos Beam, but neither of them comes with satellite amplifiers or offers Atmos support.


Please enter your comment!
Please enter your name here