ZVOX Audio may not be the flashiest name in home audio, but they’ve earned their reputation with a laser focus on one thing: making TV dialogue clearer and easier to understand. As the company that launched the first commercially successful soundbar back in 2003, ZVOX has been a quiet leader in soundbar innovation ever since.
For Amazon Prime Day 2025, which officially runs from July 8-11, ZVOX is rolling out significant discounts on some of their most popular soundbars—many featuring their patented voice clarification technology. And here’s the kicker: some deals appear to go live as early as July 6th, giving early shoppers a head start.
If you’re tired of muffled dialogue or struggling to hear what your favorite actors are saying, ZVOX’s Prime Day offers may be the perfect chance to upgrade your home theater setup without spending a fortune.
What Makes ZVOX Soundbars Stand Out: Key Features Explained
ZVOX soundbars aren’t just about loudness—they’re engineered for clarity, especially when it comes to spoken dialogue. Here’s a breakdown of the core technologies that set ZVOX apart and make their soundbars uniquely suited for everyday TV watching, movie nights, and users with hearing challenges.
AccuVoice & SuperVoice
These features are all about speech intelligibility. AccuVoice uses advanced digital signal processing to isolate and enhance human voices, making dialogue much clearer—especially in scenes with a lot of background noise. SuperVoice builds on this by further reducing competing sounds, which is particularly helpful for users with hearing impairments. Both modes allow you to fine-tune the level of enhancement depending on your needs or the content you’re watching.
PhaseCue® Virtual Surround Sound
PhaseCue is ZVOX’s proprietary surround sound processing system that creates a wider, more immersive soundstage—ideal for movie watching. When activated, it disables AccuVoice and SuperVoice, but still enhances dialogue to a degree. Each PhaseCue setting lets you adjust the depth of the virtual surround experience: the wider the effect, the more diffuse the dialogue, though it remains intelligible.
Output Leveling (OL)
Output Leveling smooths out abrupt volume changes—like those jarring jumps between TV shows and commercials. It also helps maintain consistent vocal levels, so you’re not constantly reaching for the remote during action scenes or soft-spoken dialogue.
These features are what make ZVOX soundbars a smart buy—especially during Prime Day 2025. Whether you’re after better speech clarity, a more cinematic experience, or just want fewer volume surprises, these soundbars are designed to solve real-world listening problems.
Here are the soundbar models that ZVOX Audio is discounting for Summer Prime Days.
ZVOX AV100: Compact Soundbar with Big Sound for Small Spaces
The ZVOX AV100 is the most compact soundbar in the brand’s lineup, measuring just 10″ wide x 2.75″ high x 2.5″ deep and weighing under a pound. Despite its small footprint, the AV100 is purpose-built to enhance TV audio in tight spaces—perfect for small rooms, desktops, bedrooms, or use with smaller TVs, tablets, and laptops that have compatible audio outputs.
To deliver clear and powerful sound from such a compact enclosure, the AV100 features dual high-output wide-range speakers and a passive radiator for added low-end presence. These are supported by Dolby Digital decoding and PhaseCue® Virtual Surround Sound, which help create a more immersive listening experience despite the bar’s modest size.
The AV100 also includes 6 levels of AccuVoice, allowing users to fine-tune dialogue clarity—a particularly helpful feature when watching news, sports, or movies with heavily layered soundtracks. For users in need of simple, effective audio enhancement without taking up much space, the AV100 is a smart and practical choice.
Prime Day Deal: $169.99 $84.99 at Amazon
ZBOX AV157
The ZVOX AV157 is a 17-inch wide soundbar that’s still relatively small but packed with 2″x3” high-output full-range speakers supported by a 24-watt Class D digital amplifier. Dolby Digital decoding is also provided, with additional support from the adjustable PhaseCue surround process.
ZVOX Audio processing features include 6 levels of AccuVoice and 6 levels of SuperVoice. Output leveling is also included, which stabilizes volume levels.
Inputs include optical and 3.5 mm analog. A combination headphone/subwoofer output is also included.
Prime Day Deal: $199.99 $149.99 at Amazon
ZVOX AV455
The ZVOX AV455 offers a more traditional soundbar form factor while maintaining a relatively compact footprint. At 24 inches wide and weighing just 6 pounds, it fits easily beneath most TVs without overwhelming your space, making it a solid choice for living rooms, bedrooms, or media dens.
Like the smaller AV100 and midrange AV157, the AV455 comes equipped with AccuVoice dialogue enhancement and PhaseCue® Virtual Surround Sound technology. These features work together to bring crystal-clear speech to the forefront and expand the soundstage for a more immersive experience—especially useful when watching movies or dialogue-heavy content.
With a balance of size, power, and ZVOX’s core audio technologies, the AV455 is ideal for users who want improved TV sound and clearer dialogue without stepping into oversized or overly complex soundbar setups. There are also some connection bonuses, such as HDMI-ARC, USB, and Bluetooth.
Prime Day Deal: $279.99 $179.99 at Amazon
ZVOX AV855
The ZVOX AV855 is designed for larger TV setups, measuring 33.7 inches wide and optimized for screens up to 55 inches—yet it still keeps things lightweight at just 5 pounds. It’s an excellent option for users who want fuller sound coverage without committing to a bulky multi-speaker setup.
Like its siblings, the AV855 features AccuVoice and SuperVoice technologies to dramatically improve dialogue clarity—ideal for anyone who struggles with muffled speech but doesn’t want to rely on separate hearing aids. It also includes PhaseCue® Virtual Surround Sound for a wider, more immersive soundstage and Output Leveling to tame volume spikes and keep everything balanced.
Connectivity includes HDMI-ARC and USB, making integration with modern TVs easy. However, there’s no Bluetoothsupport—which feels like a strange omission in 2025, especially for a soundbar in this price and size range. Still, if dialogue clarity and plug-and-play TV performance are your priorities, the AV855 delivers where it counts.
Prime Day Deal: $349.99 $299.99 at Amazon
ZVOX SB500
The SB500 brings on the audio power with a 140-watt Class D digital amplifier. It also incorporates a Bi-amplified design that uses electronic contouring for accurate frequency response. (42 to 20 kHz). The speaker driver complement includes two 4″ subwoofers in a ported enclosure, and three 2″ main speaker drivers. Users can also boost bass further by connecting an external wired subwoofer. AccuVoice, SuperVoice, and Output Leveling are also included. At 43 inches wide, the SB500 is subtle for use with larger screen TVs.
Prime Day Deal: $449.99 $379.99 at Amazon
Comparison
| AV100 | AV157 | AV455 | AV855 | SB500 | |
| MSRP/ Deal | $84.99 | $149.99 | $179.99 | $299.99 | $379.99 |
| Amplification | Class D digital amplifier | 24-watt Class D digital amplifier | 24-watt Class D digital amplifier | 36-Watt Digital Amplifier | 140-watt digital amplifier |
| Speaker Drivers | Two high-output, wide-range speakers supported by a passive radiator | Three 2″x3” high-output full-range speakers | Three high-performance speakers | 2″x3″ high-output full-range speakers | Three 2″ main speaker drivers |
| Built-in Subwoofer | No | No | No | Yes x 2 | Two 4″ subwoofers supported with ports |
| AccuVoice | 6 Levels | 6 Levels | 5 Levels | 10 Levels | 6 levels |
| SuperVoice | No | 6 Levels | No | 10 Levels | 6 levels |
| PhaseCue® Virtual Surround Sound | Yes | Yes | Yes | Yes | Yes |
| Virtual Subwoofer Processing | No | No | Yes | Not Indicated | Nort Indicated |
| Output Leveling | No | Yes | Not Indicated | Yes | Yes |
| Frequency Response | No indicated | Not Indicated | Not Indicated | Not Indicated | 42 Hz – 20 kHz |
| Dolby Digital or Dolby Audio Decoding | Yes | Yes | Yes | Yes | Yes |
| Bluetooth | No | No | Yes | No | Yes |
| Inputs | 1 x 3.5mm Analog/Digital Combination for Optical Digital (Toslink) or Analog Stereo Connection | 1 x Optical/ 3.5mm analog | 1 x HDMI (ARC-compatible) 1 x Optical/ 3.5mm analog 1 x USB | 1 x HDMI-ARC (compatible), 1 x Optical/3.5mm analog 1 x USB | 2 x Toslink digital optical inputs 1 x Analog RCA input |
| Outputs | No | 1 x Headphone/subwoofer output jack | 1 x Headphone/subwoofer output jack | 1 x Headphone/subwoofer output jack | 1 x Subwoofer |
| Dimensions (WHD) | 10 x 2.75 x 2.5 inches | 17 x 3.4 x 2.9 inches | 24 x 2.2 x 3.25 inches | 33.7 x 1.85 x 5 inches | 43. X 3.3 x 5.7 inches |
| Weight | 0.9 lbs | 3.1 lbs | 5.9 lbs | 5 lbs | 12.6 lbs |
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