SpeakerDecision
  • SPEAKERS
    • By Type
      Passive Bookshelf Speakers Passive Floor-standing Speakers Passive Center Channel Speakers Passive In-wall Speakers All Passive Speakers Powered Subwoofers Powered Stereo Speakers
      By Feature
      HDMI Input Room Correction Subwoofer Output Front Firing Port Handheld Remote Roon Ready
      By Brand
      Acoustic Energy Aperion Arendal Sound ATC Audio-Technica Audioengine Bluesound Bowers Wilkins Buchardt Cambridge Audio Canton Castle DALI Definitive Technology Dynaudio Edifier ELAC Emotiva Fluance Focal Fyne Audio Genelec GoldenEar Harbeth Jamo JBL Kanto KEF KLH Klipsch Leak Mackie Magico Magnepan MartinLogan McIntosh Mission MoFi Monitor Audio Nuvo Onkyo OSD Paradigm Perlisten Polk Audio PS Audio PSB Q Acoustics REL Revel Russound Sennheiser Sonos Sonus faber Sony Spendor SVS Tannoy Technics Triangle Velodyne Victrola Wharfedale Wilson Audio Yamaha
  • AMPLIFIERS
    • By Type
      All Amplifiers Integrated Amplifiers Stereo Receivers Streaming Amplifiers Power Amplifiers Compact Amplifiers
      By Power
      Up to 60 watts 61 to 90 watts 91 to 120 watts 121 to 180 watts Over 180 watts
      By Feature
      HDMI Input Room Correction Subwoofer Output Handheld Remote Roon Ready
      Home Theater
      All Home Theater Receivers Anthem ARCAM Denon Integra JBL Marantz MartinLogan McIntosh NAD Onkyo Sony Yamaha
      Headphone Amps
      All Headphone Amplifiers Cambridge Audio iFi Audio McIntosh Naim Pro-Ject Rotel Schiit Audio Sennheiser Yamaha
      Multi-Zone
      All Multi-Zone Amplifiers JBL McIntosh OSD Rotel Russound Sonos
      By Brand
      Accuphase Advance Paris Anthem Arcam Audio Research AudioControl Audioengine Audiolab Bluesound Bose Buchardt Cambridge Audio Cayin Denon Devialet ELAC Emotiva Esoteric Eversolo FiiO Fosi Audio Hegel HiFi Rose Integra JBL Layer Audio Design LEAK Luxman Marantz Mark Levinson McIntosh Michi MISSION MOON Musical Fidelity NAD Naim Onkyo OSD Parasound Pass Labs Peachtree PrimaLuna Primare PS Audio Rega Rogue Audio Roksan Rotel Schiit Audio Sonos Sony SVS T+A TEAC Technics Vincent WiiM Yamaha
  • SOUNDBARS
    • Soundbars
      Soundbars Home All Soundbars (filter + sort) Size Simulator
      By TV Size
      43-50 inch TVs 55 inch TVs 65 inch and larger
      By Feature
      Dolby Atmos height channels Subwoofer included Can add rear speakers Compact (30 in or narrower) Under $500
      By Brand
      Bluesound Bose Denon Devialet Dual Furrion Harman Kardon JBL KEF Klipsch Marshall Polk Audio Samsung Sennheiser Sonos Sony WiiM Yamaha
  • SMART FIND
  • TOOLS
  • BLOG
  1. Home
  2. Soundbars
  3. Yamaha SR-B40A vs Polk Audio Signa S4
Yamaha SR-B40A vs Polk Audio Signa S4
Yamaha SR-B40A

2.1-channel | $400

Yamaha SR-B40A
Check price atAmazon›
Polk Audio Signa S4

3.1.2-channel | $449

Polk Audio Signa S4
Check price atAmazon›
Yamaha SR-B40A vs Polk Audio Signa S4: the short answer

We can compare 13 features from the published specs. The Polk Audio Signa S4 is ahead on 3, the Yamaha SR-B40A on none, and 10 are ties. The biggest difference for movies is height: the Polk Audio Signa S4 has 2 ceiling-firing channels and the Yamaha SR-B40A has none.

Reasons to choose Polk Audio Signa S4 over Yamaha SR-B40A
  • Channel layout: 3.1.2 vs 2.1
  • Height channels: 2 vs 0
  • HDMI inputs: 1 vs 0
Side-by-Side Comparison
Yamaha SR-B40APolk Audio Signa S4
Channel layout
Counts speaker channels the bar actually has. More ear-level and height channels means a wider, taller sound field.		 2.1 3.1.2
Height channels
Drivers aimed at the ceiling, which is what makes Dolby Atmos sound overhead rather than just wide.		 0 2
Dolby Atmos Yes Yes
DTS:X No No
HDMI to the TV
eARC carries lossless Dolby TrueHD and Atmos from the TV; plain ARC compresses them.		 eARC eARC
HDMI inputs
A spare HDMI port for a games console or disc player.		 0 1
Subwoofer
Included beats optional beats none: a separate subwoofer is where deep bass comes from.		 Included Included
Rear speakers
Real rear speakers put effects behind you; without them surround is simulated from the front.		 None None
Room correction No No
Streaming Bluetooth only Bluetooth only
Voice assistant
Built in, rather than through a separate smart speaker.		 No No
Dialogue enhancement Yes Yes
Height
Lower is less likely to block the bottom of the TV picture.		 2.63 in 2.5 in
Width / suits TVs from
Neither is better: match the bar to your TV. See the size simulator below.		 35.81 in / 43-inch 41.13 in / 50-inch
Drivers in the bar 6 7
Power (total, as published)
Makers rate soundbar power differently, so the totals are not a like-for-like comparison.		 100 W —
Weight 6.4 lbs —
List price $400 $449

Green marks the better figure where one is better. Dashes are specs the maker does not publish.

Size: Both Soundbars in Front of a TV

Drawn to scale. The solid bar is the Yamaha SR-B40A, the dashed outline the Polk Audio Signa S4. Pick your TV size and how it stands to see whether either would cover the picture.

Full Specifications

Yamaha SR-B40A Specifications

Sound
Channels2.1
Dolby AtmosYes
DTS:XNo
DriversTweeters: 1" Dome (2); Woofers: 1.75" Cone (4); Subwoofer: 6.5; Enclosure: Ported
Power (bar, total)100 watts
Frequency response33-22k Hz
SubwooferIncluded
Rear speakersNone
Virtual surroundYamaha True Sound
Dialogue enhancementYes
Night modeNo
Room correctionNo
Connections
HDMI to TVeARC
HDMI inputs0
HDMI version2.0
Optical inputsYes
Analogue inputNo
USBNo
Subwoofer outputWireless
HDMI CECYes
Streaming and Control
Wi-FiNo
BluetoothYes
Voice controlNo
AppApple iOS, Android
Remote includedYes
Learns TV remoteNo
Physical
Dimensions (W x H x D)35.81 x 2.63 x 5.25 in / 910 x 67 x 133 mm
Weight6.4 lbs / 2.9 kg
Subwoofer size7.63 x 16.5 x 17.25 in (W x H x D), 17.9 lbs
Wall mountingYes (no bracket supplied)
Warranty2 Years parts, 2 Years labour
List price$400

Power is the maker's total across all drivers and is not comparable to an amplifier's per-channel rating.

Polk Audio Signa S4 Specifications

Sound
Channels3.1.2
Dolby AtmosYes
DTS:XNo
DriversTweeters: 1" Dome (3); Midrange: 2.625" Height Drivers (2); Woofers: 4.75"x1.5" Cone (2); Subwoofer: 5.9375" Cone; Enclosure: Ported
SubwooferIncluded
Rear speakersNone
Virtual surroundMovie Mode
Dialogue enhancementYes
Night modeYes
Room correctionNo
Connections
HDMI to TVeARC
HDMI inputs1
HDMI version2.1
Optical inputsYes
Analogue input3.5mm
USBNo
Subwoofer outputWireless
HDMI CECYes
Streaming and Control
Wi-FiNo
BluetoothYes
Voice controlNo
Remote includedYes
Learns TV remoteYes
Physical
Dimensions (W x H x D)41.13 x 2.5 x 3.81 in / 1045 x 64 x 97 mm
Subwoofer size7.88 x 12.94 x 12.81 in (W x H x D)
Wall mountingYes (no bracket supplied)
Warranty1 Year parts, 1 Year labour
List price$449

Power is the maker's total across all drivers and is not comparable to an amplifier's per-channel rating.

More Soundbar Comparisons
  • Yamaha SR-B40A vs Furrion Aurora FSBNN30MST
  • Yamaha SR-B40A vs JBL Bar 2.1 Deep Bass MK2
  • Yamaha SR-B40A vs Samsung HW-B750F
  • Yamaha SR-B40A vs JBL Bar 300MK2
  • Yamaha SR-B40A vs Klipsch Flexus CORE 100
  • Yamaha SR-B40A vs Dual Heritage DH-2 Solide One
  • Yamaha SR-B40A vs Sony BRAVIA Theater Bar 5
  • Yamaha SR-B40A vs Samsung HW-B630F

All soundbars ›

Most Popular Soundbars
Samsung HW-Q800H
Samsung HW-Q990H
Samsung HW-B750F
WiiM Bar
Samsung HW-Q600F
Sonos Beam Ultra
Klipsch Flexus CORE 300
Samsung HW-Q800F
JBL Bar 1000MK2
Samsung HW-QS90H
This site contains affiliate links. We may be compensated if you make a purchase after clicking through one of them. As an Amazon Associate we earn from qualifying purchases.
Copyright © 2026 by SpeakerDecision
About Privacy Contact US Camera Decision