Polk Audio Signa S4

In this polk audio signa s4 review, the short answer is that the Polk Audio Signa S4 is the best budget Dolby Atmos soundbar with up-firing speakers you can buy for $449. It finished sixth out of nine bars in our 2026 guide, where it carries the label "Best budget bar with up-firing speakers". The system is a 3.1.2 channel design with 410 watts of power and a 5.9-inch wireless subwoofer. Polk's bar holds a 4.3-star average from 1,432 Amazon ratings, and it ships with a 3-year limited warranty, the longest coverage among the budget picks. Buy it if you want real ceiling bounce on a modest budget. Skip it if you need true rear-channel surround.

The hardware is where this soundbar earns its keep. Seven drivers sit inside the 41.2-inch cabinet, including two 2.59-inch elevation speakers that fire upward and use Atmos height channels to place sound above your head. Two 0.98-inch tweeters, a 0.98-inch center channel and a pair of 4.7 by 1.57-inch racetrack mid drivers handle the front stage. Meanwhile, Polk's VoiceAdjust technology lets you raise dialogue levels without boosting the whole mix, which matters for whispered scenes. The bar reaches down to 20 Hz with the sub and carries 16 milliseconds of audio latency, so lip sync stays tight. On top of that, Bluetooth range hits 10 meters for phone and tablet streaming. Setup takes one HDMI cable and works with any TV, including 8K sets.

Value is the reason the Polk Audio Signa S4 sits at number six instead of higher. For $449 you get the same Dolby Atmos height effect that costs far more elsewhere, plus a subwoofer and a dedicated center channel in the box. By contrast, the Sonos Beam Gen 2 simulates height with processing instead of firing sound at your ceiling. Even so, this is a 3.1.2 layout, so anything behind you is virtual, and the bar carries no water resistance, so it belongs indoors. In practice, its 2.4-inch height and 19 pounds make it easy to slide under a TV or hang on the wall with the included template. If overhead effects, clear dialogue and a low profile matter most, this is the one to get.