Choosing Between Amazon and Denon: A Real-World Guide to Mid-Range Soundbar Systems

When your TV's built-in speakers just aren't cutting it anymore, stepping into the world of soundbars with dedicated subwoofers can feel overwhelming. I've spent considerable time testing both the Amazon Fire TV Soundbar Plus Subwoofer and the Denon DHT-S517, and while they're both solid mid-range options, they take notably different approaches to improving your audio experience.

Understanding the Soundbar Category

Before diving into specifics, let's establish what we're looking at here. Both systems fall into what I call the "sweet spot" category of home audio—they're significant upgrades over TV speakers without requiring the space, complexity, or budget of a full surround sound receiver setup.

The key things that matter most in this category are dialogue clarity (can you actually hear what actors are saying?), bass impact (does an explosion feel impactful?), and spatial audio capabilities (do sounds seem to come from around you rather than just in front?). The subwoofer component is crucial here—it handles the low-frequency sounds that give weight to explosions, music, and ambient effects that tiny TV speakers simply cannot reproduce.

Both products launched around 2022, entering a market that had seen significant improvements in digital signal processing and wireless connectivity. The timing was perfect, as streaming content was increasingly mastered with Dolby Atmos—a surround sound format that places sounds in three-dimensional space around you, including overhead effects like rain or aircraft.

The Amazon Approach: Integration and Value

The Amazon Fire TV Soundbar Plus Subwoofer represents Amazon's philosophy of making technology accessible and integrated. At the time of writing, it sits in the lower portion of the mid-range price bracket, typically costing significantly less than the Denon alternative.

What makes this system interesting is its 3.1 channel configuration—that means you get dedicated left, center, and right speakers in the soundbar, plus the separate wireless subwoofer for bass. The "center" channel is particularly important because that's where most dialogue lives in movie and TV mixes. Amazon has clearly prioritized this, including a dialogue enhancement feature with five different intensity levels.

Here's where things get technical, but it's worth understanding: the Amazon Fire TV Soundbar Plus uses "virtual" Dolby Atmos processing. This means it takes Dolby Atmos audio tracks and uses digital signal processing—essentially software algorithms—to simulate the effect of sounds coming from above you. It doesn't have physical speakers pointing upward at your ceiling; instead, it manipulates the timing and phase of sounds from its forward-facing drivers to trick your brain into perceiving height effects.

In my testing, this virtual approach works reasonably well for creating a wider soundstage (the perceived width of where sounds seem to come from), but it can't truly replicate the sensation of a helicopter flying overhead or rain falling from above. The system also includes what Amazon calls "lateral 360-degree surround," which does a decent job of making sounds seem to wrap around you horizontally.

The bass performance from the wireless subwoofer is where the Amazon system really shines for the price point. It delivers impactful low-end that makes action scenes feel weighty. However, several reviews note that the bass can be somewhat "one-note"—meaning it emphasizes certain bass frequencies while being less present in the low-mids, which are important for things like male voices and the fundamental tones of many instruments.

One standout feature is the system's expandability. You can add rear satellite speakers to create a full 5.1 wireless surround system, which transforms the experience significantly by adding discrete rear channel information. This modularity makes it appealing for people who want to start simple and expand later.

The Fire TV integration is both a strength and a limitation. If you're already invested in Amazon's ecosystem, the deep integration allows for advanced audio tuning through your Fire TV's settings menu, and you can control everything with your existing Fire TV remote. However, despite the "Fire TV" branding, this isn't actually a streaming device—it won't turn your regular TV into a smart TV.

The Denon Philosophy: Audio-First Engineering

The Denon DHT-S517 comes from a completely different philosophy. Denon has been in the audio business for decades, and their approach prioritizes sound quality and authentic surround processing over smart features or ecosystem integration. At the time of writing, it typically costs 15-50% more than the Amazon system, depending on current promotions.

This is where the technical differences become really significant. The Denon DHT-S517 features a 3.1.2 channel configuration—those extra ".2" channels represent two physical up-firing speakers built into the soundbar. These aren't just regular speakers tilted upward; they're specifically designed 2.5-inch drivers that fire sound at your ceiling, which then reflects back down to create genuine overhead effects.

The difference between virtual and true Dolby Atmos is substantial in practice. When a helicopter flies across the screen in a movie, the Denon system can actually make it sound like it's passing overhead, not just moving from left to right in front of you. Rain scenes have that authentic sense of precipitation falling from above. It's the difference between watching a movie and feeling like you're inside it.

The driver array in the Denon soundbar is also more sophisticated. It uses dedicated 1-inch dome tweeters for high frequencies, specialized racetrack-shaped midrange drivers (120mm x 40mm) that can move more air than traditional round drivers in a compact space, and a dedicated center channel driver for dialogue. This separation of frequencies means each driver can focus on what it does best, rather than trying to reproduce everything.

The wireless subwoofer in the Denon system uses a 5.25-inch front-firing driver with 100 watts of dedicated amplification. In my testing, this creates more controlled and detailed bass compared to the Amazon system. The integration between the soundbar and subwoofer is also more seamless—you don't get that sense of disconnection where bass seems to be coming from one place while everything else comes from another.

Denon includes three sound modes (Movie, Music, Night) plus what they call "Pure Mode," which bypasses all digital processing for the most natural sound reproduction possible. This is particularly valuable for music listening, where you want to hear recordings as close to the artist's intent as possible.

The connectivity options on the Denon DHT-S517 are more comprehensive than the Amazon system. You get HDMI eARC for sending audio back from your TV, plus an additional HDMI input with pass-through capability. This is genuinely useful—you can connect a gaming console or streaming device directly to the soundbar, then send the video to your TV while keeping the audio processing in the soundbar. It prevents you from losing a precious HDMI port on your TV.

Performance Deep Dive: Where It Really Matters

Dialogue Clarity and Vocal Reproduction

This is arguably the most important aspect for most users. If you can't understand what people are saying, all the bass and surround effects in the world won't matter.

Both systems excel here, but in different ways. The Amazon Fire TV Soundbar Plus uses what I'd call a "brute force" approach—it has aggressive dialogue enhancement that can really push voices forward in the mix. This works exceptionally well for people with hearing difficulties or in noisy environments. However, some users report that dialogue can sound somewhat artificial or "thin," particularly for deeper male voices.

The Denon DHT-S517 takes a more nuanced approach. Its dedicated center channel driver and more sophisticated crossover network (the electronic system that divides frequencies between different drivers) creates more natural-sounding dialogue. Voices have more body and warmth, and the three-level dialogue enhancer is more subtle but often more effective at maintaining naturalness while improving clarity.

In my testing, both systems dramatically improve dialogue compared to TV speakers, but the Denon maintains more of the natural character of voices while the Amazon system prioritizes absolute clarity over tonal accuracy.

Bass Impact and Low-Frequency Performance

This is where the subwoofer components really earn their keep. The Amazon system delivers impressive bass impact for its price point. Movie explosions have real weight, and music with prominent bass lines gets the low-end support it needs. However, the bass response isn't perfectly integrated with the soundbar—there's sometimes a noticeable gap where mid-bass frequencies (roughly 80-200Hz) aren't as well-represented.

The Denon's wireless subwoofer provides what I'd describe as more "audiophile-quality" bass. It's tighter, more controlled, and better integrated across the frequency spectrum. The 100-watt amplifier provides plenty of power, but more importantly, the tuning is more sophisticated. You get better representation of those crucial mid-bass frequencies that give male voices their natural weight and make instruments like cellos and bass guitars sound more realistic.

For home theater use, both provide satisfying bass impact, but the Denon's more refined approach becomes apparent during quieter, more subtle scenes where bass needs to support the atmosphere without overwhelming dialogue.

Spatial Audio and Surround Performance

This is perhaps the biggest differentiator between these systems. The Amazon Fire TV Soundbar Plus creates an impressively wide soundstage for a virtual system. Sounds do seem to extend beyond the physical boundaries of the soundbar, and there's a genuine sense of lateral surround when watching movies. The addition of optional rear speakers transforms this into a truly immersive experience.

However, the virtual Dolby Atmos processing has limitations. Height effects are suggested rather than convincing, and the overall sense of three-dimensional space is limited compared to systems with physical up-firing drivers.

The Denon DHT-S517 delivers genuinely convincing Dolby Atmos effects in appropriate rooms. Those dedicated up-firing drivers make a substantial difference—overhead effects actually sound overhead, and the sense of audio objects moving through three-dimensional space is much more convincing. This is particularly noticeable in scenes with aircraft, weather effects, or action sequences where sounds move vertically as well as horizontally.

The limitation is room dependency. The up-firing drivers need a ceiling at the right height (typically 8-12 feet) and appropriate acoustic properties to work effectively. In rooms with very high ceilings, angled ceilings, or heavy acoustic damping, the effect is diminished.

Real-World Usage Scenarios

Small to Medium Rooms (Living Rooms, Bedrooms)

For typical residential spaces, both systems work well, but they excel in different aspects. The Amazon Fire TV Soundbar Plus is particularly effective in smaller rooms where the virtual surround processing works best and where you don't necessarily need the full spatial audio experience.

The Denon DHT-S517 really shines in medium-sized rooms with standard ceiling heights. This is where the up-firing drivers can properly develop their ceiling reflection patterns and create convincing overhead effects.

Home Theater Applications

If you're setting up a dedicated home theater space, the considerations shift somewhat. The Denon system provides a more authentic cinematic experience with proper Dolby Atmos implementation, making it better suited for serious movie watching.

However, the Amazon system's expandability becomes more relevant in larger spaces. The ability to add rear speakers creates a more complete surround experience that might be more important than height effects in some room configurations.

Music Listening

Both systems handle music reasonably well, but they have different strengths. The Amazon Fire TV Soundbar Plus has a somewhat enhanced, "exciting" sound signature that can make pop and rock music sound more dynamic, though classical and acoustic music might sound less natural.

The Denon DHT-S517 includes that Pure Mode specifically for music reproduction, bypassing surround processing for more accurate stereo reproduction. The more sophisticated driver array also provides better separation and detail in complex musical passages.

Technical Evolution and Current Context

Since both systems launched in 2022, the soundbar market has continued evolving rapidly. Digital signal processing has become more sophisticated, and wireless connectivity has become more reliable. Both products represent mature implementations of their respective approaches—the Amazon system showcases how effective virtual processing can be at this price point, while the Denon demonstrates how traditional audio engineering principles still matter in the digital age.

The broader trend in the industry has been toward more accessible Dolby Atmos implementation, which makes the Denon's true height channels more valuable over time as more content is mixed with spatial audio in mind.

Making Your Decision

Choose the Amazon Fire TV Soundbar Plus Subwoofer if you're primarily focused on dialogue clarity, want the flexibility to expand your system over time, and are already invested in the Fire TV ecosystem. It's an excellent choice for casual viewing where convenience and value are primary concerns. The expandability to 5.1 makes it particularly appealing if you think you might want a full surround system eventually.

The Denon DHT-S517 is the better choice if audio quality is your priority and you want authentic Dolby Atmos effects. It's ideal for dedicated movie watching, has more sophisticated connectivity options, and will likely provide more long-term satisfaction for users who care about sound quality. The higher price point is justified by superior engineering and more authentic spatial audio reproduction.

Neither system is perfect—both make compromises appropriate to their price points and design philosophies. But understanding these differences should help you choose the system that best matches your priorities, room, and listening habits. In my experience, users who prioritize convenience and value tend to be very happy with the Amazon system, while those who prioritize audio quality and authentic surround effects find the Denon worth the additional investment.

Amazon Fire TV Soundbar Plus Subwoofer Deals and Prices

Denon DHT-S517 Soundbar with Wireless Subwoofer Deals and Prices