
Polk Audio Signa S3
Score: 69/100
Sony HT-S400
Score: 49/100Rankings

The Signa S3 is a budget-friendly 2.1-channel soundbar with a wireless subwoofer, offering Chromecast streaming, Google Assistant compatibility and solid bass for small-to-medium rooms.

The Sony HT-S400 is a compact 2.1-channel soundbar with a powerful 330 W output and virtual surround technology. It offers HDMI ARC, Bluetooth 5.0 and a wireless subwoofer, making it a strong upgrade over built-in TV speakers.
| Attribute | ![]() | ![]() |
|---|---|---|
— | 330 Wbest | |
2.1best | 2.1best | |
| ↓ lower better | 1.8 kgbest | 2.4 kg |
12 monthsbest | 12 monthsbest | |
| ↓ lower better | — | 0.5 Wbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Audio Performance(1) | ||
Supported Audio Formats | Dolby Digital 5.1 | Dolby Digital, Dolby Dual Mono, LPCM 2ch, SBC |
Build & Design(1) | ||
Soundbar Weight (kg) | 1.8 kg | 2.4 kg |
Connectivity(1) | ||
Bluetooth Version | 4.0 | 5.0 |


Products in the top-left offer the best value (high score, low price).

Reviewers highlight its excellent value, deep bass and Chromecast integration, while noting the lack of Atmos and limited EQ controls.
Users appreciate the loud, distortion-free sound and easy setup, but criticize the flimsy remote and absence of advanced surround formats.

Professional reviewers commend the HT-S400 for delivering cinema-like sound and strong bass at a budget-friendly price, highlighting its virtual surround technology and clear dialogue reproduction. However, they point out the lack of auxiliary inputs and the absence of premium surround formats as notable drawbacks for audiophiles.
Everyday users overwhelmingly praise the soundbar for its dialogue clarity, punchy bass, and straightforward HDMI ARC setup. Common complaints revolve around missing USB/AUX inputs, limited surround depth, and the subwoofer's size in tight spaces.
“Powerful audio performance with deep, distortion-free bass.”

“Chromecast and Google Assistant make streaming a breeze.”

“The remote feels cheap and the LED indicators are confusing.”


