Head-to-head · Best Soundbars Under $300

Polk Audio Signa S2 vs Yamaha SR-B40A

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

Yamaha SR-B40A comes out ahead by a narrow margin (4.3 vs 4.4). The gap is mostly about apartment and bedroom setups where balanced tonal response and dialog clarity matter more than 5.1 surround — 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 #4 in Best Soundbars Under $300

Yamaha SR-B40A

4.4

$300

The SR-B40A is the smaller-room specialist. Yamaha's tuning prioritizes dialog clarity and balanced tonal response over raw volume, which makes it the right pick for apartments and bedrooms where the Samsung HW-B750D or Polk Audio Signa S4 would overwhelm the space. Virtual Atmos is decent but predictably not on par with the real upfiring channels on the Signa S4. The Clear Voice mode is the standout feature.

Strengths

— Optimized for small-to-medium rooms — apartment-friendly sound balance
— Virtual Dolby Atmos via Yamaha's DSP processing
— Clear Voice mode is one of the most natural dialog enhancers in this round-up

Watch-outs

— 2.1 channel layout — loses to the Samsung HW-B750D and Vizio M-Series 5.1 on surround capability
— Virtualized Atmos — no real upfiring drivers like the Polk Audio Signa S4
— Sometimes sits at or just above $300 — buy on sale to fit budget

$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.

Yamaha SR-B40A

Best dialog clarity in this lineup along with the Polk Audio Signa S4. Smaller-room focus differentiates it from the Samsung HW-B750D and Vizio M-Series 5.1's bigger-room 5.1 setups. Same channel count as the Polk Audio Signa S2 but with virtual Atmos that the Signa S2 lacks.

Specs side-by-side

Spec	Polk Audio Signa S2	Yamaha SR-B40A
Channels	2.1	2.1
Subwoofer	Wireless 5.25" included	Wireless included
Audio Formats	Dolby Digital 5.1 (downmixed)	Dolby Atmos (virtual), Dolby Digital
Connectivity	HDMI ARC, Optical, Bluetooth	HDMI ARC, Optical, Bluetooth 5.1
Dialog Tech	VoiceAdjust	Clear Voice

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