Polk Audio Signa S4 vs Sony BRAVIA Theatre Bar 5

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Signa S4 compared with BRAVIA Theatre Bar 5

	Polk AudioSigna S4	SonyBRAVIA Theatre Bar 5
Overview
Released
Released	December 2021	2026
Sound
Type
Type	Soundbar	Soundbar
Channels
Channels	3.1.2	3.1
Dolby Atmos
Dolby Atmos	Yes	Yes
Drivers
Drivers	Seven soundbar drivers — two 25 mm tweeters, two 120 × 40 mm racetrack midrange drivers, one 25 mm centre full-range driver and two 66 mm elevation drivers; included subwoofer has a 150 mm woofer	Three forward-facing 45 × 82 mm full-range cone drivers in the SA-B500 bar, including a dedicated centre channel; supplied SA-WB500 bass-reflex subwoofer with a 160 mm driver. Four active drivers in total; Atmos height and surround effects use virtual processing, without upward-firing or rear units
Amplifiers
Amplifiers	–	S-Master digital amplifier; 250 W total claimed output. Japan maker qualifies this as non-simultaneous JEITA maximum, comprising 50 W each for left, centre and right and 100 W for the subwoofer
Audio formats
Audio formats	Linear PCM, Dolby Digital, Dolby Digital Plus, Dolby TrueHD and Dolby Atmos (maker manual); non-Atmos content can be upmixed for virtual height effects	Dolby Atmos, Dolby TrueHD, Dolby Digital Plus, Dolby Digital, DTS:X, DTS and multichannel LPCM over HDMI eARC; Japan table also lists DTS-HD High Resolution and Master Audio. Compatible input and television output settings determine available formats
Room tuning
Room tuning	Movie, Music and Night modes; VoiceAdjust with three levels; bass adjustment	Manual listening-distance adjustment in BRAVIA Connect; S-Force PRO, Vertical Surround Engine and Dolby Speaker Virtualizer. No automatic microphone room calibration (WIRED)
Connections
Wi-Fi
Wi-Fi	No	No
Bluetooth
Bluetooth	Yes	Yes
AirPlay
AirPlay	No	No
HDMI eARC
HDMI eARC	Yes	Yes
Voice assistants
Voice assistants	None	None
Bluetooth
Bluetooth	Bluetooth 5.0; SBC codec; A2DP 1.3 and AVRCP 1.6; maker line-of-sight range approximately 10 m	Bluetooth 5.3 receiver with SBC and AAC; A2DP and AVRCP; Bluetooth Low Energy for BRAVIA Connect communication
Ports
Ports	One HDMI eARC/ARC connection, optical digital input, 3.5 mm analogue input and USB-A for firmware updates; no HDMI video passthrough input	One HDMI TV eARC/ARC output and optical digital input; no HDMI input or video passthrough. USB-A UPDATE port is for software updates on HT-B500; USB music playback in the shared manual applies only to regional models with that function. Separate mains connections for bar and subwoofer
Streaming
Streaming	Bluetooth music playback; no Wi-Fi streaming or built-in voice assistant	Bluetooth audio from a phone, tablet or computer; no Wi-Fi, AirPlay or integrated voice assistant (WIRED)
Multi-room
Multi-room	–	Included subwoofer connects wirelessly to the bar; this is a dedicated bar-and-subwoofer system, without additional rear speakers
App
App	–	Sony BRAVIA Connect for setup, listening-distance settings and controls; maker manual requires a smartphone app, account and sign-in for initial setup
Design
Weight
Weight	2.9 kg (better)	3 kg
Controls
Controls	Top buttons and supplied remote; HDMI control and TV remote learning; remote lacks backlighting (WIRED)	Side power button, supplied remote, status LEDs, voice and night modes, bass adjustment and Sound Field on/off; DSEE enhancement. Voice Zoom 3 and TV quick settings require a compatible BRAVIA television
Microphones
Microphones	–	No automatic calibration microphone or built-in voice assistant (WIRED); Voice Zoom 3 processes programme dialogue through a compatible television
Mounting
Mounting	Soundbar can be wall mounted; mounting template and spacers supplied	Tabletop placement or wall mounting using the supplied paper template; suitable screws are not supplied according to the shared maker guide
Size
Size	Soundbar 1046 × 95 × 60 mm, W × D × H, 2.9 kg; subwoofer 200 × 328 × 280 mm, W × D × H, 4.1 kg. Main weight is bar only.	UK specification gives bar 900 × 64 × 100 mm (W × H × D), 3 kg body alone; Japan table gives 110 mm depth. Subwoofer 192 × 388 × 400 mm and 7.3 kg; weights are separate components rather than shipping mass
Colours
Colours	Black; Signa S4D is an online-exclusive finish, not a different acoustic generation	Black
In the box
In the box	Soundbar, wireless subwoofer, remote, soundbar and subwoofer power cords, HDMI and optical cables, two AAA batteries, quick-start guide, registration and safety cards, wall template and spacers	Bar speaker, wireless subwoofer, remote with batteries, AC cords, reference and quick setup guides, wall-mounting template and warranty card; UK maker additionally lists an HDMI cable, while WIRED's US review unit did not include a connection cable