soundbars

Polk Audio Signa S4

Name: Polk Audio Signa S4
Brand: Polk Audio

#4 · Best with Subwoofer

7.4 /10 Our score

Lowest verified price $449.00 Amazon

Our verdict

A balanced choice for families. It gives up some simplicity for better movie sound while still treating dialogue seriously.

Pros

Dedicated center channel
Three-level VoiceAdjust raises voices only
Night Mode lifts speech and cuts bass
Wireless subwoofer included
Dolby Atmos and Bluetooth

Cons

Lacks deep low bass, and surround is unimpressive
Subwoofer needs a second power outlet
Older design; a successor model exists
Fewer dialogue levels than the ZVOX bars

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Last reviewed October 26, 2026

Review

What to know about Polk Audio Signa S4

A slim 3.1.2 Atmos bar with a dedicated center channel and Polk's 3-level VoiceAdjust, which raises only voices, plus a Night Mode that cuts bass and lifts speech. RTINGS says dialogue reproduces 'quite clearly and accurately', and TrustedReviews praises its clear dialogue channel.

Editorial notes

Why it stands out

Why we like it

This is the pick for households that want both clear dialogue and a full-sounding movie night. The dedicated center channel handles speech, and VoiceAdjust raises only voices across three levels. RTINGS says dialogue is reproduced quite clearly and accurately, and TrustedReviews praises its dialogue channel.

Night Mode cuts bass and lifts speech, useful for late viewing without disturbing others. It connects by HDMI ARC and optical.

What to know

Skip it if you want the simplest setup. The wireless sub needs its own outlet, and there are more parts to place.

Performance

Score breakdown

Dialogue clarity

How intelligible speech is in tested content (news, dramas, busy action mixes), as judged by independent testers. Center-channel performance counts here.

8.3

Lab-tested center channel (RTINGS).

Dialogue boost range & controls

Range and fine-tuning of speech enhancement (number of levels, AI or auto modes), plus volume leveling and night modes that help hard-of-hearing listeners.

7.0

3 VoiceAdjust levels plus Night Mode.

Ease of setup & use for seniors

Simple single-cable setup, TV-remote control via HDMI-ARC/CEC, a clear remote with big buttons, and no required app.

7.0

HDMI ARC/CEC and no app, but a sub to place and power.

Overall sound quality

Music and movie sound beyond dialogue (bass, naturalness at normal settings), so the bar suits the whole household.

7.5

Atmos with a sub, but RTINGS says it lacks deep bass.

Value

Dialogue performance per dollar at typical US street prices.

6.8

$449 is fair for a 3.1.2 system.

Safety, energy & repairability

Recall history, idle power, availability of replacement remotes and power supplies, and renewed or refurbished options.

5.0

Neutral: no parts or refurbishment evidence found. 2021 design, still sold new.

Specifications

Polk Audio Signa S4 specs

Dialogue

Dialogue feature: VoiceAdjust
Dialogue enhancement levels: 3 levels
Dedicated center channel / speech driver: Yes

Audio

Channel configuration: 3.1.2
Dolby Atmos: Yes
Separate subwoofer included: Yes

Connectivity

HDMI ARC/eARC: Yes
Optical input: Yes
Bluetooth: Yes

Shopping

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Disclosure: We may earn a commission when you purchase through links on this page. This does not affect our editorial rankings.

Prices and availability may change. The retailer's price and availability at checkout govern the transaction.

Retailer	Price	Availability
AmazonLowest	$449.00	In Stock	View deal
Best Buy	$449.00 Last known price — verified Oct 26, 2026; may have changed	Check at retailer	Check at retailer
Walmart	Check price at retailer	Check at retailer	Check at retailer

Lowest verified price $449.00

30-day low $449.00

90-day average $449.00

90-day low $449.00

Based on 3 retailer price observations captured during the last 90 days.

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