Polk Audio Signa S4
Score: 84/100
JBL Cinema SB580
Score: 83/100Rankings
The Polk Signa S4 is a slim 3.1.2-channel soundbar with Dolby Atmos and a powerful wireless subwoofer, delivering strong bass and clear dialogue. Its lack of a standard HDMI input and occasional Bluetooth hiccups limit connectivity flexibility. Ideal for budget-conscious TV owners seeking immersive sound in small to medium rooms.
The JBL Cinema SB580 is a low-profile 3.1-channel soundbar with strong 440 W RMS output and virtual Dolby Atmos. Its compact height and wireless subwoofer come at the cost of lacking true surround speakers for larger spaces. Best suited for small-to-medium rooms where space is limited.
| Attribute | | |
|---|---|---|
— | 3.1best | |
410 W | 440 Wbest | |
15 cm | 16.51 cmbest | |
| ↓ lower better | 4 kgbest | 10 kg |
3 yearsbest | — | |
104.6 cmbest | 95 cm | |
6.1 cm | 6.4 cmbest | |
9.4 cmbest | 8 cm |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Audio(3) | ||
Audio Channels | 3.1.2 | 3.1 |
Total Power Output (W) | 410 W | 440 W |
Subwoofer Driver Size (cm) | 15.0 cm | 16.51 cm |
Design(4) | ||
Soundbar Weight (kg) | 4.0 kg | 10.0 kg |
Soundbar Width (cm) | 104.6 cm | 95.0 cm |
Soundbar Height (cm) | 6.1 cm | 6.4 cm |
Soundbar Depth (cm) | 9.4 cm | 8.0 cm |
Products in the top-left offer the best value (high score, low price).
Professional reviewers commend the Signa S4 for its impressive bass output, clear dialogue thanks to VoiceAdjust, and effective Atmos height effects, noting it offers strong value in the entry-level Atmos segment. However, they criticize the missing standard HDMI input and the need for careful bass balancing.
Everyday users love the easy wireless sub setup, the room-shaking bass, and the clear speech reproduction, especially for movies and sports. Common complaints revolve around the sub's heft, occasional Bluetooth hiccups, and the inability to connect multiple HDMI sources, with some noting the bass can dominate mids if not tuned.
Professional reviewers, such as Guru3D, commend the SB580 for its accurate spatial imaging delivered by the Virtual Dolby Atmos engine, its ultra-slim form factor that blends seamlessly with TVs, and its comprehensive connectivity options. The high power output and broad frequency range are also highlighted as delivering a cinema-like experience in a compact package.
“huge soundstage”
“powerful bass that rumbles behind couch”
