Polk Audio Signa S3 vs Polk Audio Signa S4

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Signa S3 compared with Signa S4

	Polk AudioSigna S3	Polk AudioSigna S4
Overview
Released
Released	2020	December 2021
Sound
Type
Type	Soundbar	Soundbar
Channels
Channels	2.1	3.1.2
Dolby Atmos
Dolby Atmos	No	Yes
Drivers
Drivers	Two 1.25 × 4.4 in oval midrange drivers and two 1 in tweeters; ported wireless subwoofer has a 5.25 in driver. Maker sheet's 165 mm parenthesis conflicts with the current maker table's 13.34 cm.	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
Frequency response
Frequency response	45 Hz–20 kHz system response (maker; no tolerance published)	–
Audio formats
Audio formats	Dolby Digital 5.1 decoding and PCM over HDMI ARC or optical, reproduced through a stereo 2.1 system; no Dolby Atmos or DTS Virtual:X (GearLab)	Linear PCM, Dolby Digital, Dolby Digital Plus, Dolby TrueHD and Dolby Atmos (maker manual); non-Atmos content can be upmixed for virtual height effects
Room tuning
Room tuning	Movie, Music and Night modes; eight bass adjustment steps and three VoiceAdjust levels	Movie, Music and Night modes; VoiceAdjust with three levels; bass adjustment
Connections
Wi-Fi
Wi-Fi	Yes	No
Bluetooth
Bluetooth	Yes	Yes
AirPlay
AirPlay	No	No
HDMI eARC
HDMI eARC	No	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
Wi-Fi
Wi-Fi	Wi-Fi networking for Chromecast built-in; setup through the Google Home app	–
Ports
Ports	One HDMI ARC connection, Toslink optical and 3.5 mm AUX input; USB maintenance port, not normal playback; no separate HDMI video input or passthrough (AVForums)	One HDMI eARC/ARC connection, optical digital input, 3.5 mm analogue input and USB-A for firmware updates; no HDMI video passthrough input
Streaming
Streaming	Chromecast audio from compatible music apps over Wi-Fi, plus Bluetooth playback	Bluetooth music playback; no Wi-Fi streaming or built-in voice assistant
Multi-room
Multi-room	Google Home grouping with other Chromecast-enabled speakers	–
App
App	Google Home for network setup, grouping and automatic overnight firmware updates	–
Design
Weight
Weight	–	2.9 kg
Controls
Controls	Top power, source, Bluetooth and volume buttons; IR remote, HDMI CEC and IR learning; four status LEDs. Google Assistant music control requires a separate compatible speaker; no built-in voice assistant.	Top buttons and supplied remote; HDMI control and TV remote learning; remote lacks backlighting (WIRED)
Mounting
Mounting	Rear keyhole hangers and supplied wall-mount spacers	Soundbar can be wall mounted; mounting template and spacers supplied
Size
Size	Current maker table gives soundbar 89.99 × 5.46 × 8.18 cm and subwoofer 17.07 × 34.04 × 30.99 cm, W × H × D. Maker sheet separately lists bar 898 × 56 × 83 mm and subwoofer 171 × 311 × 343 mm, with conflicting inch equivalents.	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.
Colours
Colours	Black	Black; Signa S4D is an online-exclusive finish, not a different acoustic generation
In the box
In the box	Soundbar, wireless subwoofer, IR remote and AAA battery, two power cords, HDMI and optical cables, wall-mount spacers and literature (maker quick-start guide); information sheet additionally lists a soundbar power supply.	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