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Vizio M Series M51ax-J6 vs Amazon Fire TV Soundbar Plus with Sub + Speakers

Which Soundbar Is Better?

    Top
    Main Differences
    Design
      Style - BarStyle - SubwooferStyle - SatellitesDimensions - BarDimensions - SubwooferDimensions - SatellitesMountingBuild QualityIn The Box
    Sound
      Stereo Frequency ResponseStereo Frequency Response With Preliminary CalibrationStereo SoundstageStereo DynamicsCenterSurround 5.1Height (Atmos)Sound Enhancement Features
    Connectivity
      Inputs/Outputs - BarAudio Format Support: ARC/eARCAudio Format Support: HDMI InAudio Format Support: OpticalAudio Latency: ARCAudio Latency: HDMI InAudio Latency: OpticalVideo Passthrough To TVWireless Playback
    Additional Features
      InterfaceBar ControlsRemoteVoice Assistants Support
    Comments

Products

Vizio M Series M51ax-J6
Amazon Fire TV Soundbar Plus with Sub + Speakers

Tested using Methodology v1.3

Updated Sep 04, 2024 06:58 PM

SEE PRICE
Amazon.com

Tested using Methodology v1.3

Updated May 16, 2025 05:39 PM

SEE PRICE
Amazon.com
Vizio M Series M51ax-J6 Picture
Amazon Fire TV Soundbar Plus with Sub + Speakers Picture
Channels
Locked
Channels
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  1. Recommended in 5 articles:
  2. Soundbars
  3. Budget
  4. Music
  5. 2

Our Verdict

Vizio M Series M51ax-J6

Amazon Fire TV Soundbar Plus with Sub + Speakers

The Vizio M Series M51ax-J6 and Amazon Fire TV Soundbar Plus with Sub + Speakers are similar 5.1-channel soundbars with external subwoofers and satellite speakers. The Amazon is built better and reaches similar levels at max volumes in individual channel tests. That said, the Vizio is priced more competitively and supports PCM-7.1 channel input via HDMI and can pass through 4k @ 120Hz video.

0 

Variants

  • M Series M51ax-J6 (Dark Charcoal)
  • Fire TV Soundbar Plus with Sub + Speakers (Black)

Review

See Vizio M Series M51ax-J6 Review
See Amazon Fire TV Soundbar Plus with Sub + Speakers Review
8 
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Check Price

Dark Charcoal
M Series M51ax-J6
SEE PRICE
Amazon.com
Black
Fire TV Soundbar Plus with Sub + Speakers
SEE PRICE
Amazon.com
Dark Charcoal
M Series M51ax-J6
SEARCH
B&H
Black
Fire TV Soundbar Plus with Sub + Speakers
SEARCH
B&H
Dark Charcoal
M Series M51ax-J6
SEARCH
BestBuy.com
Black
Fire TV Soundbar Plus with Sub + Speakers
SEARCH
BestBuy.com
Dark Charcoal
M Series M51ax-J6
SEARCH
Walmart.com
Black
Fire TV Soundbar Plus with Sub + Speakers
SEARCH
Walmart.com

Main Differences for
Mixed Usage

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Full Comparison

Design

Style - Bar  

Style photo - bar  

Vizio M Series M51ax-J6 Style photo - bar Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Style photo - bar Sample

SAMPLE

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Show Text 

Style - Subwoofer  

Style photo - sub  

Vizio M Series M51ax-J6 Style photo - sub Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Style photo - sub Sample

SAMPLE

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Sub Wireless 
 

Locked
Locked

Enclosure 
 

Locked
Locked
Show Text 

Style - Satellites  

Style photo - satellites  

Vizio M Series M51ax-J6 Style photo - satellites Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Style photo - satellites Sample

SAMPLE

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Satellite Wireless 
 

Locked
Locked
Show Text 

Dimensions - Bar  

Dimensions photo - bar  

Vizio M Series M51ax-J6 Dimensions photo - bar Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Dimensions photo - bar Sample

SAMPLE

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Width  

Lock" (Lock cm)
Lock" (Lock cm)

Height  

Lock" (Lock cm)
Lock" (Lock cm)

Depth  

Lock" (Lock cm)
Lock" (Lock cm)
Show Text 

Dimensions - Subwoofer  

Dimensions photo - sub  

Vizio M Series M51ax-J6 Dimensions photo - sub Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Dimensions photo - sub Sample

SAMPLE

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Width  

Lock" (Lock cm)
Lock" (Lock cm)

Height  

Lock" (Lock cm)
Lock" (Lock cm)

Depth  

Lock" (Lock cm)
Lock" (Lock cm)
Show Text 

Dimensions - Satellites  

Dimensions photo - satellites  

Vizio M Series M51ax-J6 Dimensions photo - satellites Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Dimensions photo - satellites Sample

SAMPLE

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Width  

Lock" (Lock cm)
Lock" (Lock cm)

Height  

Lock" (Lock cm)
Lock" (Lock cm)

Depth  

Lock" (Lock cm)
Lock" (Lock cm)
Show Text 

Mounting 
 

Bar Mounting Holes  

Vizio M Series M51ax-J6 Bar Mounting Holes Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Bar Mounting Holes Sample

SAMPLE

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Satellite Mounting Holes  

Vizio M Series M51ax-J6 Satellite Mounting Holes Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Satellite Mounting Holes Sample

SAMPLE

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Mountable Bar 
 

Locked
Locked

Bar Brackets Included 
 

Locked
Locked

Mountable Satellites 
 

Locked
Locked

Satellite Brackets Included 
 

Locked
Locked
Show Text 

Build Quality 
 

N/A
N/A

Build quality photo  

Vizio M Series M51ax-J6 Build quality photo Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Build quality photo Sample

SAMPLE

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Show Text 

In The Box 
 

In The Box photo   

Vizio M Series M51ax-J6 In The Box photo Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers In The Box photo Sample

SAMPLE

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Show Text 
Sound

Stereo Frequency Response 
 

N/A
N/A

Stereo Setup  

Vizio M Series M51ax-J6 Stereo Setup Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Stereo Setup Sample

SAMPLE

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Raw Frequency Response  

Vizio M Series M51ax-J6 Raw Frequency Response Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Raw Frequency Response Sample

SAMPLE

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Frequency Response Small  

Vizio M Series M51ax-J6 Frequency Response Small Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Frequency Response Small Sample

SAMPLE

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Channels 
 

Locked
Locked

Tested Preset 
 

Locked
Locked

Slope 
 

Lock
Lock

Standard Error 
 

Lock dB
Lock dB

Low-Frequency Extension 
 

Lock Hz
Lock Hz

High-Frequency Extension 
 

Lock kHz
Lock kHz
Show Text 

Stereo Frequency Response With Preliminary Calibration 
 

N/A
N/A

Frequency Response Calibrated  

Vizio M Series M51ax-J6 Frequency Response Calibrated Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Frequency Response Calibrated Sample

SAMPLE

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Suggested Preset 
 

Locked
Locked

Suggested Bass Setting 
 

Lock
Lock

Suggested Treble Setting 
 

Lock
Lock

Slope 
 

Lock
Lock

Standard Error 
 

Lock dB
Lock dB

Low-Frequency Extension 
 

Lock Hz
Lock Hz

High-Frequency Extension 
 

Lock kHz
Lock kHz
Show Text 

Stereo Soundstage 
 

N/A
N/A

Crosstalk  

Vizio M Series M51ax-J6 Crosstalk Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Crosstalk Sample

SAMPLE

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Crosstalk Error 
 

Lock dB
Lock dB
Show Text 

Stereo Dynamics 
 

N/A
N/A

Dynamic Range Compression  

Vizio M Series M51ax-J6 Dynamic Range Compression Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Dynamic Range Compression Sample

SAMPLE

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SPL @ Max Volume 
 

Lock dB SPL
Lock dB SPL

DRC @ 90dB 
 

Lock dB
Lock dB

DRC @ Max Volume 
 

Lock dB
Lock dB
Show Text 

Center 
 

N/A
N/A

Center Setup  

Vizio M Series M51ax-J6 Center Setup Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Center Setup Sample

SAMPLE

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Frequency Response  

Vizio M Series M51ax-J6 Frequency Response Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Frequency Response Sample

SAMPLE

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Localization 
 

Locked
Locked

Slope 
 

Lock
Lock

Std. Err. 
 

Lock dB
Lock dB

SPL @ Max Volume 
 

Lock dB SPL
Lock dB SPL

Weighted THD @ 80dB 
 

Lock
Lock

Weighted THD @ Max Volume 
 

Lock
Lock
Show Text 

Surround 5.1 
 

N/A
N/A

Surround Setup  

Vizio M Series M51ax-J6 Surround Setup Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Surround Setup Sample

SAMPLE

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Frequency Response  

Vizio M Series M51ax-J6 Frequency Response Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Frequency Response Sample

SAMPLE

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Localization 
 

Locked
Locked

Slope 
 

Lock
Lock

Std. Err. 
 

Lock dB
Lock dB

SPL @ Max Volume 
 

Lock dB SPL
Lock dB SPL

Weighted THD @ 80dB 
 

Lock
Lock

Weighted THD @ Max Volume 
 

Lock
Lock

7.1 Rears 
 

Locked
Locked
Show Text 

Height (Atmos) 
 

N/A
N/A

Height Setup  

Vizio M Series M51ax-J6 Height Setup Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Height Setup Sample

SAMPLE

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H Frequency Response  

Vizio M Series M51ax-J6 H Frequency Response Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers H Frequency Response Sample

SAMPLE

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Localization 
 

Locked
Locked

Slope 
 

Lock
Lock

Std. Err. 
 

Lock dB
Lock dB

SPL @ Max Volume 
 

Lock dB SPL
Lock dB SPL

Weighted THD @ 80dB 
 

Lock
Lock

Weighted THD @ Max Volume 
 

Lock
Lock
Show Text 

Sound Enhancement Features 
 

N/A
N/A

Room Correction 
 

Locked
Locked

Dialogue Enhancement 
 

Locked
Locked

Auto-Volume/Night Mode 
 

Locked
Locked

Subwoofer Level Adjustment 
 

Locked
Locked

Bass Adjustment 
 

Locked
Locked

Treble Adjustment 
 

Locked
Locked

EQ 
 

Locked
Locked

Surround Level Adjustment 
 

Locked
Locked

Rear Level Adjustment 
 

Locked
Locked

Height Level Adjustment 
 

Locked
Locked

Virtual Surround 
 

Locked
Locked
Show Text 
Connectivity

Inputs/Outputs - Bar 
 

Physical Connections Bar Photo 1  

Vizio M Series M51ax-J6 Physical Connections Bar Photo 1 Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Physical Connections Bar Photo 1 Sample

SAMPLE

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Physical Connections Bar Photo 2  

Vizio M Series M51ax-J6 Physical Connections Bar Photo 2 Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Physical Connections Bar Photo 2 Sample

SAMPLE

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Optical Audio In 
 

Locked
Locked

HDMI Out 
 

Locked
Locked

HDMI 2.1 Class Bandwidth 
 

Locked
Locked

Full HDMI In 
 

Locked
Locked

Analog Audio In 3.5mm (Aux) 
 

Locked
Locked

RCA In 
 

Locked
Locked

USB for Files 
 

Locked
Locked

Ethernet 
 

Locked
Locked

Subwoofer Output 
 

Locked
Locked
Show Text 

Audio Format Support: ARC/eARC 
 

N/A
N/A

Dolby Atmos 
 

Locked
Locked

Dolby Digital 
 

Locked
Locked

Dolby Digital Plus 
 

Locked
Locked

Dolby TrueHD 
 

Locked
Locked

DTS 
 

Locked
Locked

DTS:X 
 

Locked
Locked

DTS-HD MA 
 

Locked
Locked

PCM Channels 
 

Locked
Locked
Show Text 

Audio Format Support: HDMI In 
 

N/A
N/A

Dolby Atmos 
 

Locked
Locked

Dolby Digital 
 

Locked
Locked

Dolby Digital Plus 
 

Locked
Locked

Dolby TrueHD 
 

Locked
Locked

DTS 
 

Locked
Locked

DTS:X 
 

Locked
Locked

DTS-HD MA 
 

Locked
Locked

PCM Channels 
 

Locked
Locked
Show Text 

Audio Format Support: Optical 
 

N/A
N/A

Dolby Digital 
 

Locked
Locked

DTS 
 

Locked
Locked

PCM Channels 
 

Locked
Locked
Show Text 

Audio Latency: ARC 
 

N/A
N/A

ARC Latency Video  

Vizio M Series M51ax-J6 ARC Latency Video Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers ARC Latency Video Sample

SAMPLE

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PCM-2.0 ch 
 

Lock ms
N/A

PCM-5.1 ch 
 

Lock ms
N/A

Dolby MAT (PCM) Atmos 
 

Lock ms
Lock ms

Dolby Digital 
 

Lock ms
Lock ms

Dolby Digital Plus 
 

Lock ms
Lock ms

Dolby Digital Plus Atmos 
 

Lock ms
Lock ms
Show Text 

Audio Latency: HDMI In 
 

N/A
N/A

HDMI Latency Video  

Vizio M Series M51ax-J6 HDMI Latency Video Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers HDMI Latency Video Sample

SAMPLE

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PCM-2.0 ch 
 

Lock ms
N/A

PCM-5.1 ch 
 

Lock ms
N/A

Dolby MAT (PCM) Atmos 
 

Lock ms
N/A

Dolby Digital 
 

Lock ms
N/A

Dolby Digital Plus 
 

Lock ms
N/A

Dolby Digital Plus Atmos 
 

Lock ms
N/A
Show Text 

Audio Latency: Optical 
 

N/A
N/A

Optical Latency Video  

Vizio M Series M51ax-J6 Optical Latency Video Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Optical Latency Video Sample

SAMPLE

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PCM-2.0 ch 
 

Lock ms
Lock ms

Dolby Digital 
 

Lock ms
Lock ms
Show Text 

Video Passthrough To TV 
 

N/A
N/A

1080p Max Refresh Rate 
 

Locked
N/A

1080p @ 4:4:4 Max Refresh Rate 
 

Locked
N/A

4k Max Refresh Rate 
 

Locked
N/A

4k @ 120Hz @ 10-Bit 
 

Locked
N/A

4k @ 4:4:4 Max Refresh Rate 
 

Locked
N/A

8k Max Refresh Rate 
 

Locked
N/A

HDR10 Passthrough 
 

Locked
N/A

HDR10+ Passthrough 
 

Locked
N/A

Dolby Vision Passthrough 
 

Locked
N/A

HDMI Forum VRR Passthrough 
 

Locked
N/A

FreeSync Passthrough 
 

Locked
N/A

G-SYNC Passthrough 
 

Locked
N/A

ALLM Passthrough 
 

Locked
N/A
Show Text 

Wireless Playback 
 

N/A
N/A

Bluetooth 
 

Locked
Locked

Wi-Fi Playback 
 

Locked
Locked

Chromecast built-in 
 

Locked
Locked

Apple AirPlay 
 

Locked
Locked

Spotify Connect 
 

Locked
Locked
Show Text 
Additional Features

Interface 
 

Interface photo  

Vizio M Series M51ax-J6 Interface photo Sample

SAMPLE

Create your free account for limited access to pictures & test results
Amazon Fire TV Soundbar Plus with Sub + Speakers Interface photo Sample

SAMPLE

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Display 
 

Locked
Locked
Show Text 

Bar Controls 
 

Controls photo  

Vizio M Series M51ax-J6 Controls photo Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Controls photo Sample

SAMPLE

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Show Text 

Remote  

Remote photo  

Vizio M Series M51ax-J6 Remote photo Sample

SAMPLE

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Amazon Fire TV Soundbar Plus with Sub + Speakers Remote photo Sample

SAMPLE

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Show Text 

Voice Assistants Support 
 

Amazon Alexa 
 

Locked
Locked

Google Assistant 
 

Locked
Locked

Apple Siri 
 

Locked
Locked

Microphone Mute 
 

Locked
Locked
Show Text 

Check Price

Dark Charcoal
M Series M51ax-J6
SEE PRICE
Amazon.com
Black
Fire TV Soundbar Plus with Sub + Speakers
SEE PRICE
Amazon.com
Dark Charcoal
M Series M51ax-J6
SEARCH
B&H
Black
Fire TV Soundbar Plus with Sub + Speakers
SEARCH
B&H
Dark Charcoal
M Series M51ax-J6
SEARCH
BestBuy.com
Black
Fire TV Soundbar Plus with Sub + Speakers
SEARCH
BestBuy.com
Dark Charcoal
M Series M51ax-J6
SEARCH
Walmart.com
Black
Fire TV Soundbar Plus with Sub + Speakers
SEARCH
Walmart.com
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Vizio M Series M51ax-J6

Amazon Fire TV Soundbar Plus with Sub + Speakers

Comments

  1. Comparison
 • Posted 6 months ago

Vizio M Series M51ax-J6 vs Amazon Fire TV Soundbar Plus with Sub + Speakers: Main Discussion

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