Vizio M21d-H8 vs Polk Audio Signa S4 review

Votes 1 1
Rating 5 5

Vizio M21d-H8 vs Polk Audio Signa S4 comparison chart

Overall
Vizio M21d-H8
5
Polk Audio Signa S4
7.8
6
9

Vizio M21d-H8 vs Polk Audio Signa S4 review

Vizio M21d-H8
vs
Polk Audio Signa S4

If you have already decided that you want to buy a new soundbar, but still don’t know what exactly you want, the Vizio M21d-H8 vs Polk Audio Signa S4 comparison is here to offer you two decent solutions. The Vizio M21d-H8 was rated 5, while the Polk Audio Signa S4 has a rating 7.8. The soundbars are equipped with a different number of buttons, power, volume down, volume up, source, Bluetooth for the M21d-H8 and power, source, demo, volume down, volume up for the Signa S4.

Audio features

Each of the models under consideration has active amplification type. A noticeable difference is the number of channels that M21d-H8 has 2.1 and Signa S4 has 3.1.2. A built-in subwoofer is available only in the Vizio M21d-H8. Audio features and specs of considered models we rated 5 out of 10 in our ranking.

Streaming services

The Signa S4 can play audio from Spotify.

Connectivity

Wireless Internet connection is realized only in the Signa S4. Soundbars from this comparison have Bluetooth support. There are 1/1 HDMI inputs/outputs in the Vizio M21d-H8 versus 0/1 HDMIs in the Polk Audio Signa S4. As in the M21d-H8, so in the Signa S4 there is the HDMI Audio Return Channel (ARC). Connecting devices via USB is possible in both models. The connectivity of each of the models was estimated at 6/10. The manufacturer of the Signa S4 provides a device control application. The soundbars in this review are equipped with a microphone. The models under consideration cannot become part of a multiroom system.

Multichannel surround

Dolby Atmos audio decoder is onboard the Signa S4. Devices from this comparison cannot process surround sound due to lack of DTS:X. The M21d-H8 was rated 5/10, while the Signa S4 received a mark of 9/10 for multichannel surround.

Advantages Vizio M21d-H8 over Polk Audio Signa S4

  • Built-in subwoofer

Advantages Polk Audio Signa S4 over Vizio M21d-H8

  • Separate subwoofer in package
  • Amazon Music compatible
  • Spotify support
  • WI-FI enabled
  • App control
  • Compatible with Dolby Atmos
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Common

Product

Vizio M21d-H8
Polk Audio Signa S4

Model

M21d-H8
Signa S4

Brand

Vizio
Polk Audio

Reviews

4
0

General

Placement type

table-top, wall-mountable
table-top, wall-mountable

Connection to source

wired, wireless
wired, wireless

Soundbar buttons

power, volume down, volume up, source, Bluetooth
power, source, demo, volume down, volume up

Audio features

Built-in channels

2.1
3.1.2

Amplification type

active
active

Output power, W

80 (overall)

Separate speaker (in package)

0
0

Separate speaker connections

has not
has not

Subwoofer

Built-in subwoofer

Separate subwoofer (in package)

Separate subwoofer connections

wireless

Streaming services

Apple Music (AirPlay)

Amazon Music

Spotify

Other streaming services

has not
Pandora, SoundCloud

Connectivity

WI-FI

Bluetooth

Ethernet (RJ45)

0
0

NFC

HDMI input/output

1/1
0/1

HDMI ARC

HDMI eARC

HDMI CEC

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)

1/0
0/0

Headphone output

0
0

Subwoofer output

0
0

Features

Voice control

Amazon Alexa, Google Assistant, Siri

App control

Microphone

Remote control

Multi-room

Multichannel surround

Dolby Atmos

Dolby (other)

Dolby Digital
Dolby Digital, Dolby Digital Plus, Dolby TrueHD

DTS:X

DTS (other)

DTS Virtual:X
DTS HD

User manual

Manual

N/A

Dimensions

Size (Wx H x D), cm/in

98 x 11.4 x 18.8/39 x 5 x 7
104.6x9.5x6/41.2x3.7x2.4

Weight, kg/pounds

3/6
2.9/6

Other

Release year

2020
2021
Vizio M21d-H8
Polk Audio Signa S4
Vizio M21d-H8
Polk Audio Signa S4

Soundbars SoundStrokes Art comparison rating

  • better
  • worse
  • 5
  • 7.8
  • 5Vizio M21d-H8
  • 7.8Polk Audio Signa S4

Vizio M21d-H8 competitors

Polk Audio Signa S4 competitors