Budget 2.1 Soundbar Showdown: Polk Audio Signa S2 vs LG S40T

If you've ever found yourself constantly reaching for the TV remote to turn up the volume during dialogue scenes, or if explosions in action movies sound more like gentle puffs than earth-shaking booms, it's time to consider upgrading your TV's built-in speakers. The good news? You don't need to spend a fortune or install a complex surround sound system to dramatically improve your viewing experience.

Two budget-friendly 2.1 channel soundbars have been making waves in the market: the Polk Audio Signa S2 and the LG S40T. Both promise to transform your TV audio without breaking the bank, but they take surprisingly different approaches to achieving that goal. After spending considerable time with both systems, I can tell you that choosing between them isn't as straightforward as picking the cheaper option – it's about understanding which philosophy matches your specific needs and setup.

Understanding the 2.1 Soundbar Category

Before diving into the specifics, let's clarify what we're dealing with. A 2.1 channel soundbar consists of two main audio channels (left and right) plus a dedicated subwoofer (the ".1" part) that handles low-frequency sounds like bass drums, explosions, and rumbling engines. This configuration represents the sweet spot for most people upgrading from TV speakers – you get significantly better dialogue clarity, much deeper bass, and a wider soundstage without the complexity of a full surround sound setup.

The main considerations when shopping in this category include power output (measured in watts), dialogue enhancement technology, connectivity options, build quality, and how well the system integrates with your existing devices. Unlike higher-end soundbars that focus on creating immersive surround sound experiences, these budget models prioritize making your current content sound dramatically better than it does through your TV's tiny built-in speakers.

What's particularly interesting about this category is how much the technology has evolved since these models first appeared. The Polk Audio Signa S2 launched in 2020, while the LG S40T arrived in 2024, giving LG nearly four years to incorporate newer processing technologies and connectivity standards. This generational gap becomes apparent when you examine their feature sets and design philosophies.

Performance Where It Matters Most

Audio Power and Room-Filling Capability

The most immediately noticeable difference between these two systems is their approach to power delivery. The Polk Audio Signa S2 flexes its muscles with 120 watts of total power output, distributed across a four-driver soundbar array and a 5.25-inch wireless subwoofer. When I first set up the Polk in my living room, the difference from my TV's speakers was dramatic – dialogue that previously required subtitles became crystal clear, and action sequences gained the kind of weight and impact that makes you forget you're not in a movie theater.

The power advantage isn't just about getting loud – though the Polk Audio Signa S2 can certainly fill larger rooms without strain. It's about maintaining audio clarity and bass response even at higher volumes. In my testing, I could push the Polk to about 80% of its maximum volume before noticing any compression or distortion, which is impressive for a budget soundbar. This makes it particularly well-suited for larger living rooms or open-concept spaces where you need the sound to carry across multiple seating areas.

The LG S40T, on the other hand, takes a more refined approach. While LG doesn't specify exact power figures, the system clearly prioritizes balanced audio processing over raw output. In smaller to medium-sized rooms, this approach works beautifully. The sound remains controlled and articulate, with a focus on accuracy rather than impact. I found myself appreciating this philosophy during quieter content like documentaries or dialogue-heavy dramas, where the LG's restraint prevented audio fatigue during longer viewing sessions.

Bass Response and Low-End Performance

The subwoofer performance tells an interesting story about each manufacturer's priorities. The Polk Audio Signa S2's 5.25-inch driver in a ported enclosure delivers bass that you can actually feel. During action movies, explosions have genuine impact, and music with deep bass lines gets the kind of foundation that makes you want to turn up the volume. However, this comes with a caveat – the bass can sometimes overwhelm the midrange frequencies, creating what audio enthusiasts call a "V-shaped" sound signature where bass and treble are emphasized at the expense of midrange clarity.

The LG S40T's smaller subwoofer takes a more measured approach. While it won't rattle your windows or make your neighbors complain, it provides clean, controlled bass that complements rather than dominates the overall sound. This makes it particularly effective for late-night viewing when you want enhanced audio without disturbing others. The trade-off is obvious – if you're craving that visceral bass response for action movies or bass-heavy music, the LG might leave you wanting more.

Dialogue Clarity – The Make-or-Break Factor

Here's where both systems show their understanding of what matters most to everyday users: clear, intelligible dialogue. Nothing ruins a movie or TV show experience like constantly rewinding to catch what someone said, and both soundbars address this fundamental issue, albeit through different technological approaches.

The Polk Audio Signa S2 employs what they call VoiceAdjust technology. This isn't just marketing speak – it's a genuinely useful feature that allows you to boost vocal frequencies without affecting the rest of the audio spectrum. In practice, this means you can make dialogue crystal clear without making music soundtracks overly bright or harsh. The implementation gives you manual control, so you can dial in the exact amount of voice enhancement that works for your room and hearing preferences.

The LG S40T counters with Clear Voice Plus, which represents a more modern approach to the same problem. Instead of giving you manual controls, this system automatically analyzes the incoming audio signal and applies real-time processing to enhance vocal clarity. It essentially creates a virtual center channel – simulating the dedicated dialogue speaker you'd find in higher-end surround sound systems. During my testing, I was impressed by how seamlessly this worked across different types of content, from mumbled movie dialogue to news broadcasts.

Music Performance – Beyond TV Audio

While these systems are primarily designed for TV enhancement, they both offer Bluetooth connectivity for music streaming, making them potential replacements for standalone Bluetooth speakers. This is where their different philosophies become most apparent.

The Polk Audio Signa S2's V-shaped sound signature makes music sound exciting and energetic. Pop songs with prominent vocals and strong bass lines sound fantastic, and the system's power reserves mean you can fill a room with your favorite tracks without any sense of strain. However, this tuning can make some genres sound unnatural – acoustic music or jazz might seem overly colored, with bass that's too prominent and midrange that's too recessed.

The LG S40T provides a more neutral foundation for music listening. While it doesn't have the raw impact of the Polk, it presents a more balanced frequency response that works well across a wider variety of musical genres. Classical music, jazz, and acoustic performances benefit from this restraint, sounding more natural and less hyped. The advanced Bluetooth 5.3 connectivity also provides a more stable wireless connection with better audio quality than the Polk's standard Bluetooth implementation.

Design Philosophy and Build Quality

The physical design of these soundbars reveals a lot about their intended users and use cases. The Polk Audio Signa S2 prioritizes function over form with its utilitarian black finish and focus on acoustic performance. At 35.43 inches wide but only 2.15 inches tall, it's designed to fit in front of most TVs without blocking remote sensors or screens. This ultra-slim profile is genuinely useful – I've seen too many soundbars that force users to raise their TV or deal with blocked sensors.

The LG S40T takes a more design-conscious approach. Its distinctive crest pattern and metal grille construction position it as both an audio device and a design element. At 28.40 inches wide, it's more compact than the Polk, making it better suited to smaller entertainment centers or wall-mounting situations where space is at a premium. The build quality feels more premium, which matters if the soundbar will be prominently displayed in your living room.

Both systems include wireless subwoofers that can be placed anywhere in the room for optimal bass response. The Polk's subwoofer is larger and more imposing, while the LG's is more compact and easier to hide. Neither approach is inherently better – it depends on your room layout and aesthetic preferences.

Connectivity and Smart Features

This is where the four-year age gap between these products becomes most apparent. The Polk Audio Signa S2 offers solid but basic connectivity: HDMI ARC, optical, and 3.5mm analog inputs, plus standard Bluetooth for wireless music streaming. It includes both HDMI and optical cables in the box, which is thoughtful for immediate setup. The HDMI ARC connection allows you to control the soundbar's volume using your TV remote, which simplifies daily use significantly.

The LG S40T leverages newer technology with Bluetooth 5.3, which provides better range, more stable connections, and improved audio quality compared to older Bluetooth standards. More importantly for LG TV owners, it includes WOW Orchestra integration – a feature that allows the soundbar to work in harmony with compatible LG TV speakers rather than replacing them entirely. This creates a more enveloping sound experience without requiring a full surround sound setup.

For LG TV owners, the integration goes even deeper. The unified remote control system means you can control both your TV and soundbar with a single remote, and the systems can automatically optimize audio settings based on what you're watching. This kind of ecosystem integration represents where the industry is heading, but it obviously only benefits users who are already invested in LG's ecosystem.

Format Support and Audio Processing

Modern content comes in various audio formats, and how well each soundbar handles these formats affects your viewing experience. The Polk Audio Signa S2 supports Dolby Digital, which covers the vast majority of streaming content, Blu-rays, and broadcast TV. When it encounters surround sound content, it downmixes everything to stereo, which works fine but doesn't provide any sense of surround sound immersion.

The LG S40T goes further with support for both Dolby Digital and DTS Digital. DTS is commonly found on Blu-ray discs and some streaming content, so this broader format support means fewer compatibility issues. The newer processing also handles format conversion more gracefully, though like the Polk, it ultimately outputs everything in stereo since neither system supports modern immersive audio formats like Dolby Atmos.

Real-World Use Cases and Scenarios

After extensive testing in different environments, clear patterns emerge about where each system excels. The Polk Audio Signa S2 shines in larger rooms where you need serious sound output. If you have a family room with high ceilings, an open floor plan, or you simply like your action movies loud and impactful, the Polk delivers. It's also the better choice if you frequently stream music and want a system that can double as a room-filling Bluetooth speaker for parties or background music.

The LG S40T works best in smaller to medium-sized rooms where audio refinement matters more than raw power. It's particularly well-suited to apartment living or situations where you need to be mindful of neighbors. The automatic audio processing makes it more plug-and-play friendly – you'll spend less time tweaking settings and more time enjoying content.

For home theater enthusiasts working with limited budgets, both systems represent significant upgrades over TV speakers, but neither will satisfy users craving true surround sound immersion. If you're planning to eventually upgrade to a full surround system, consider these as stepping stones rather than final destinations.

When Each System Makes Sense

The Polk Audio Signa S2 is your best bet if you prioritize audio impact over everything else. Choose it when you have a large room, want maximum flexibility with any TV brand, prefer manual control over automatic processing, or plan to use the system heavily for music listening. Its proven VoiceAdjust technology and higher power output make it particularly appealing for users who want to dial in their perfect sound.

The LG S40T makes more sense if you value integration, aesthetics, and balanced performance. It's the clear choice for LG TV owners who want seamless ecosystem integration, anyone working with limited space, users who prefer automatic audio optimization, or those who prioritize design as much as performance. Its broader format support also provides better future-proofing for different types of content.

At the time of writing, both systems typically sell for similar prices in the budget soundbar category, making the decision more about features and philosophy than pure value. The Polk Audio Signa S2 offers better raw performance per dollar, while the LG S40T provides more sophisticated features and integration for the same investment.

The Bottom Line

Neither soundbar will revolutionize your home theater experience the way a high-end system might, but both will dramatically improve your TV audio in their own ways. The Polk Audio Signa S2 takes the brute force approach – more power, bigger bass, maximum impact. The LG S40T focuses on refinement, integration, and balanced performance.

Your choice ultimately depends on your priorities: Do you want maximum audio impact, or do you prefer sophisticated processing? Is ecosystem integration important, or do you value universal compatibility? Are you trying to fill a large space with sound, or do you need something more restrained for close-quarters listening?

Both represent solid upgrades from TV speakers, but they'll appeal to different types of users. Choose the Polk Audio Signa S2 for power and flexibility, or the LG S40T for integration and refinement. Either way, you'll wonder why you waited so long to upgrade your TV audio.

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