Oppo Enco Air5s Review: Redefining Comfort in the Semi-In-Ear Market

Following the recent arrival of the standard Oppo Enco Air5 for testing, the tech world’s attention has quickly shifted toward its newly released sibling: the Oppo Enco Air5s. Positioned as a distinct alternative within the company’s audio portfolio, the Air5s represents Oppo’s first foray into the "semi-in-ear" design language for this specific product line. By stripping away the traditional silicone eartips, Oppo is betting heavily on the comfort-first demographic. But does this architectural shift compromise the audio fidelity and utility that users have come to expect?

We have spent the last few days putting these buds through their paces to determine if the "Air" branding is more than just a marketing term.

Main Facts: A New Direction for the Enco Line

The Oppo Enco Air5s enters a crowded market of wireless audio accessories with a clear mission statement: maximum comfort for long-duration wear. Available in three distinct colorways—Lunar White, Midnight Black, and Starlight Purple—the aesthetics are sleek, modern, and unmistakably premium.

The most significant departure from the standard Enco Air5 is the form factor. By utilizing an open-ear, semi-in-ear design, the Air5s avoids the intrusion of silicone tips, which have long been a point of contention for users who experience ear canal fatigue. However, this design choice brings with it a fundamental change in how the device interacts with the user’s environment. While the Enco Air5s retains the core DNA of the Enco family, including the 12mm dynamic drivers, the hardware footprint has been significantly altered. The result is a lighter, more compact package that promises to disappear into your daily routine, though not without trade-offs in battery capacity and acoustic isolation.

Chronology: From the Enco Air5 to the Air5s

To understand the evolution of the Enco Air5s, one must look at the recent trajectory of Oppo’s audio division.

• The Baseline: The Oppo Enco Air5 series was introduced to provide a high-fidelity, feature-rich experience for the mid-range market. It set a benchmark for drivers and battery efficiency.
• The Pivot: Recognizing a segment of the market that prioritizes breathability and long-term comfort, Oppo engineers began the development of the "s" variant.
• The Launch: Following the successful reception of the Air5, the Air5s was unveiled, marketed specifically as an open-ear solution.
• Current Status: With the device now in our hands for comprehensive testing, we are analyzing how this transition from a sealed-canal design to a semi-open design impacts the daily user experience, specifically regarding noise management and sound staging.

Supporting Data: Specifications and Performance Metrics

When comparing the Enco Air5s to its predecessor, the internal specifications tell a tale of optimization versus compromise.

Hardware Comparison

The Enco Air5s maintains the impressive 12mm dynamic driver found in the standard Air5, ensuring that the raw potential for sound production remains high. However, to achieve the more compact form factor, the internal battery architecture has been scaled back. The individual buds house 40.5mAh batteries, a notable decrease from the 62mAh cells found in the standard Air5.

Battery Longevity

Despite the smaller cells, the overall power management remains efficient. The case still houses a 530mAh battery, though the total runtime reflects the hardware changes. While the standard Enco Air5 boasts up to 52 hours of total playback, the Air5s manages a respectable 48 hours. For the average commuter or office worker, this four-hour difference is largely negligible, but it serves as a reminder that size constraints dictate power density.

The Gesture Control Upgrade

One of the most pleasant surprises in our testing of the Air5s is the inclusion of sliding gesture support for volume control. While the standard Air5 relied heavily on taps, the ability to slide a finger along the stem of the Air5s to adjust volume is a game-changer. For users who frequently toggle volume during workouts or busy commutes, this feature is not just a luxury—it is a functional necessity that elevates the user interface above many competitors in the same price bracket.

Official Responses and Engineering Philosophy

Oppo has remained transparent about the engineering challenges involved in the Air5s project. In conversations regarding the design, the company’s representatives emphasize that the "semi-in-ear" decision was not taken lightly.

"The goal," notes one Oppo spokesperson, "was to create a product that could be worn for an eight-hour workday without the user ever feeling the need to take them out."

This philosophy directly addresses the common complaint that in-ear monitors (IEMs) create a "pressure" or "vacuum" effect. By allowing for a more open fit, the Air5s maintains natural airflow. Oppo acknowledges that this choice inherently weakens passive noise isolation—the physical act of blocking sound with a silicone plug—but they argue that the comfort-to-performance ratio is the optimal balance for their target demographic.

Implications: The Reality of Open-Ear Audio

What does this mean for the end-user? The implications of the open-ear design are far-reaching, affecting everything from sound quality to noise cancellation efficacy.

The ANC Paradox

The Enco Air5s does feature Active Noise Cancellation (ANC), but it is vital to manage expectations. Unlike the sealed, pressurized experience of the standard Air5, the Air5s cannot rely on the physical barrier of a silicone tip to assist the ANC algorithm. Consequently, the noise cancellation is best described as "ambient attenuation." It effectively takes the sharp edges off high-frequency city noise, such as distant sirens or the hum of an air conditioner, but it cannot compete with the deep silence provided by traditional in-ear buds.

Sound Signature

Because there is no vacuum seal, the bass response in the Air5s is noticeably lighter than in the Air5. While the mid-range is crisp and the treble is vibrant—thanks to those 12mm drivers—audiophiles who crave a deep, resonant low end may find the sound signature slightly thin. However, the trade-off is a wider, more natural soundstage. The music feels less "inside your head" and more like it is being played in the space around you, which can be a more relaxing experience for long-term listening.

Daily Utility and Ergonomics

The case design is where the Air5s truly shines. It is exceptionally light and compact, making it an ideal companion for a pocket or a small bag. The design is clearly intended for the user who is constantly on the move and values portability over maximum acoustic isolation.

Final Verdict: Is it for you?

The Oppo Enco Air5s is a specialized tool. It is not trying to be the best noise-canceling earbud on the market, nor is it attempting to be a reference-grade monitor for studio mixing. Instead, it succeeds at being the most comfortable daily driver for users who find traditional silicone-tipped earbuds irritating or isolating.

If you value the ability to hear your surroundings, if you have sensitive ear canals, and if you enjoy the convenience of touch-sensitive volume controls, the Enco Air5s is a compelling upgrade. However, if your primary concern is blocking out the world during a loud flight or achieving heavy bass-driven performance, you would be better served sticking with the standard Enco Air5 or the Pro variant.

Oppo has successfully diversified its audio lineup, proving that there is still room for innovation in the "semi-in-ear" space. The Enco Air5s is a testament to the idea that sometimes, the best feature isn’t what you hear, but how long you can listen without noticing you’re wearing them at all. As we continue our long-term testing, we look forward to seeing how these buds hold up against the rigors of daily wear, but for now, they stand as a strong contender in the comfort-first category of the wireless audio market.