Choosing Between Modern Dolby Atmos Soundbars: A Detailed Comparison

When it comes to enhancing your TV's audio, today's soundbars offer impressive technology that was unthinkable just a few years ago. Let's dive into a detailed comparison of two compelling options: the budget-friendly Polk Audio Signa S4 ($269.85) and the premium LG S90TR ($796.99).

Understanding Modern Soundbars

The home theater landscape has changed dramatically since these products were released in 2021-2022. Dolby Atmos, once a premium feature, has become increasingly accessible. But what exactly is Atmos? Think of it as a 3D bubble of sound around you, where audio can appear to come from specific points in space, including overhead. It's achieved through cleverly designed upward-firing speakers that bounce sound off your ceiling.

The key difference between these systems lies in their channel configurations. The Polk Signa S4 offers a 3.1.2 setup (three front channels, one subwoofer, two height channels), while the LG S90TR boasts a more comprehensive 7.1.3 arrangement (adding four surround speakers and an extra height channel). This seemingly simple numerical difference translates to a notably different listening experience.

Performance Deep Dive

Movie Performance

The Polk S4 punches above its weight class here. Its dedicated center channel ensures clear dialogue, while the upward-firing speakers create a convincing sense of height during scenes with overhead action. However, without rear speakers, you'll miss some of the immersion during scenes where sound should travel behind you.

The LG S90TR, with its additional channels and more powerful amplification (440W vs 80W), creates a more enveloping soundstage. During testing, movies like "Dune" showcase the system's ability to place sounds precisely in three-dimensional space. The additional rear speakers make a significant difference during chase scenes or when aircraft fly overhead.

Music Playback

Both systems handle music differently. The Polk S4's simpler configuration actually works in its favor for stereo content, delivering a clean, focused presentation. The LG's more complex system can sometimes over-process stereo music, though it includes modes to address this.

The LG S90TR's AI Room Calibration feature - which automatically adjusts sound based on your room's acoustics - gives it an edge for serious music listening. It can detect and compensate for room reflections and standing waves that might otherwise color the sound.

Gaming Experience

For gamers, the difference between these systems is substantial. The LG S90TR supports 4K/120Hz passthrough with VRR (Variable Refresh Rate), making it future-proof for next-gen gaming consoles. Its superior channel separation helps pinpoint enemy locations in competitive games.

The Polk Signa S4 handles gaming adequately but lacks these gaming-specific features. However, its lower latency makes it a solid choice for casual gamers who prioritize immediate audio response over positional accuracy.

Technical Capabilities and Connectivity

The connectivity options tell an interesting story about each unit's target audience. The Polk S4 keeps it simple with HDMI eARC, optical input, and Bluetooth. This covers the basics but might feel limiting if you have multiple sources.

The LG S90TR offers a more comprehensive package:

• Multiple HDMI inputs with 4K/120Hz support
• Wi-Fi connectivity with Apple AirPlay and Chromecast
• Bluetooth 5.1 with higher quality codecs
• WOW Orchestra technology for integration with LG TVs

Value Proposition and Real-World Use

Small to Medium Rooms

In spaces under 300 square feet, the Polk Signa S4 might actually be the better choice. Its 80W power output is plenty for these environments, and the simpler setup means fewer potential acoustic issues. The money saved could go toward room treatment or other entertainment upgrades.

Larger Spaces

The LG S90TR truly shines in larger rooms. Its additional power handling and speaker channels create a more convincing soundfield in spaces over 300 square feet. The AI room calibration becomes particularly valuable here, helping to optimize sound for challenging acoustic environments.

How to Make Your Decision

Choose the Polk Signa S4 if:

• Your budget is around $300
• You have a small to medium-sized room
• You primarily watch TV and movies
• You want simple setup and operation
• You're upgrading from TV speakers or a basic soundbar

Choose the LG S90TR if:

• You have a larger room
• You're serious about gaming
• You want maximum immersion
• You plan to integrate with other smart home devices
• Budget isn't your primary concern

Future-Proofing Considerations

Both systems support Dolby Atmos, but the LG's additional features and upgradeability make it more future-proof. Its support for high-resolution audio formats and advanced gaming features means it's likely to remain relevant longer.

Conclusion

The Polk Signa S4 represents exceptional value, delivering convincing Atmos performance at an accessible price point. It's an excellent choice for those entering the world of immersive audio or working with space constraints.

The LG S90TR justifies its premium price through superior performance, features, and flexibility. It's the clear choice for enthusiasts who want the best possible home theater experience and have the space to appreciate it fully.

Your choice ultimately depends on your specific needs, room size, and budget. Both products excel in their respective price categories, making either a worthy upgrade to basic TV audio.

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