Soundbars / Polk Audio
Polk Audio Signa S4
Real up-firing Atmos drivers under $450 — no smarts, just height.
Overall score 6.8/10
Pros
- + True up-firing height drivers rather than virtualised Atmos, which most bars at this price lack
- + VoiceAdjust genuinely helps with mumbled dialogue
- + Dolby Atmos Certified
- + Included wireless subwoofer
Cons
- − No Wi-Fi or smart features of any kind
- − No DTS:X support
- − Cannot be expanded with rear speakers
- − 2022 hardware still selling at a 2022 price
- − 42 inches wide, so it needs a wide TV stand
Polk Audio Signa S4 review: what the specs say
Real up-firing Atmos drivers under $450 — no smarts, just height. At $449, Polk Audio's 2022 model sits in the middle of the range — the soundbars we compare run from $129.99 to $1,999.99. It scores 6.8/10 overall, calculated from published specifications across 8 categories rather than from a subjective impression.
Its strongest showing is Dialogue Clarity at 8.0/10 — how well speech cuts through a busy soundtrack. The weakest is Connectivity at 4.5/10, which is the trade-off to weigh before buying: if that is the specification you care about most, one of the alternatives below will serve you better.
Worth knowing before you buy: no Wi-Fi or smart features of any kind; and no DTS:X support. Every specification on this page comes from Polk Audio's own documentation or a verified retail listing — where a figure is not published, the table says so rather than estimating it.
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Full Specifications
| Channels | 3.1.2 |
| Total Power | Not published by the manufacturer W |
| Subwoofer | Included (wireless), 5.9-inch driver |
| Rear Speakers | None — Polk's SR2 wireless surrounds pair with the MagniFi range, not the Signa S4 |
| Dolby Atmos | Yes |
| DTS:X | No |
| HDMI Ports | 1 ports |
| HDMI Passthrough | None — eARC output only |
| eARC | Yes |
| Wi-Fi & Streaming | None |
| Bluetooth | Not published by the manufacturer |
| Voice Assistant | None |
| Connectivity | HDMI eARC, Optical, Bluetooth, 3.5mm analog |
| Material | Fabric-wrapped bar with wireless subwoofer |
| Warranty | 12 months |
Compare Polk Audio Signa S4 With
Cheaper Alternative
Sony BRAVIA Theater Bar 5 (HT-B500) — $349.99
Premium Alternative
Yamaha TRUE X BAR 50A (SR-X50A) — $499.95