Head-to-head · Best Soundbars Under $300

Polk Audio Signa S2 vs Polk Audio Signa S4

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

Polk Audio Signa S4 comes out ahead by a narrow margin (4.3 vs 4.5). The gap is mostly about movie watchers who want true Dolby Atmos height effects and best-in-class dialog clarity without paying $500+ — read the strengths below before deciding.

Ranked #5 in Best Soundbars Under $300

Polk Audio Signa S2

4.3

$200

The Signa S2 is the budget tier of this round-up. Polk's VoiceAdjust delivers dialog clarity comparable to the Signa S4 at a third the price, and the wireless 5.25" sub gives it real low-end despite the 2.1 layout. The compromises are predictable: no Atmos, older HDMI ARC, Bluetooth-only streaming. For a first soundbar upgrading from TV speakers, this is the entry point.

Strengths

— Cheapest pick in this round-up — frequently under $200
— Wireless 5.25" subwoofer included
— Polk's VoiceAdjust technology for dialog clarity

Watch-outs

— No Dolby Atmos support (virtual or real) — 2.1 only
— Older HDMI ARC (not eARC) — limits high-bitrate audio passthrough
— Bluetooth only — no Wi-Fi or streaming app integration

$200 · Check Price on Amazon Full review →

Higher ratedRanked #2 in Best Soundbars Under $300

Polk Audio Signa S4

4.5

$300

The Signa S4 is the Dolby Atmos pick at this price tier. Two real upfiring speakers create height effects that DTS Virtual:X (Samsung HW-B750D) and Yamaha SR-B40A can only virtualize. The 3.1.2 channel layout with wireless sub is a step up from 2.1 competitors in this lineup. The catch: MSRP is $399, but it routinely sells for $250-300 on sale — which is when it becomes the obvious pick.

Strengths

— Real Dolby Atmos with two upfiring height channels — only Atmos-certified pick in this round-up
— 3.1.2 channel configuration with wireless subwoofer included
— Polk VoiceAdjust technology brings dialog forward — best speech clarity in this lineup

Watch-outs

— MSRP of $399 — only fits under $300 on sale (frequently does)
— Bluetooth only — no Wi-Fi, AirPlay, or Chromecast like the Polk MagniFi Max
— Smaller subwoofer (5.9") than the Samsung HW-B750D

$300 · Check Price on Amazon Full review →

How they stack up

Polk Audio Signa S2

Cheapest pick by a wide margin. No Atmos (real or virtual) — Samsung HW-B750D simulates with DTS Virtual:X, Vizio M-Series 5.1 and Yamaha SR-B40A virtualize Atmos, and Polk Audio Signa S4 has real upfiring. Same VoiceAdjust dialog tech as the Signa S4 at a third the price.

Polk Audio Signa S4

Only real Dolby Atmos pick here. Beats the Samsung HW-B750D, Yamaha SR-B40A, Polk Audio Signa S2, and Vizio M-Series 5.1 on Atmos certification. Loses to the Samsung HW-B750D on channel count (3.1.2 vs 5.1). Polk VoiceAdjust gives it the dialog-clarity edge.

Specs side-by-side

Spec	Polk Audio Signa S2	Polk Audio Signa S4
Channels	2.1	3.1.2 (with upfiring)
Subwoofer	Wireless 5.25" included	Wireless 5.9" included
Audio Formats	Dolby Digital 5.1 (downmixed)	Dolby Atmos, Dolby Digital
Connectivity	HDMI ARC, Optical, Bluetooth	HDMI eARC, Optical, Bluetooth
Dialog Tech	VoiceAdjust	VoiceAdjust

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