
Oppo Enco Air4 Review: Great Sound Quality with 1 Flaw
Oppo Enco Air4
For RM249, the Oppo Enco Air4 provides a good listening experience with strong bass, making it a great budget option.
Positives
- Strong, impactful bass.
- Affordable price
- Decent overall sound quality for the price
Negatives
- Treble can be limited
- Mid-range can be overshadowed by the bass.
The Oppo Enco Air4 represents the latest addition to Oppo’s true wireless earbud lineup, launching alongside the Reno 13 series. Positioned as a more budget-friendly option, the Enco Air4 comes in at nearly half the price of the Pro edition.

This lower price point, however, means the omission of the LHDC 5.0 codec, raising questions about its overall audio performance.

Given the striking similarity in exterior design between the Enco Air4 and its Pro counterpart, this review will forgo a detailed build overview and instead focus directly on the crucial aspect of sound quality, exploring how this more affordable model stacks up in delivering a satisfying listening experience.
Oppo Enco Air4 Sound Quality
Treble
The Enco Air4’s treble presentation can be described as natural and agile, though it exhibits limitations in its upper range. The earbuds struggle to reach the higher frequencies, which can lead to roll off during high notes.

This gentle treble response, however, works exceptionally well with genres like acoustic music and synthwave. In these styles, the treble’s smooth character complements the overall sound signature. However, this gentleness also means the treble sometimes sits slightly below the bass in the mix, occasionally being overshadowed.
A prime example of the Air4’s treble strengths is listening to tracks like “On the Run” by Timecop1983. The song’s smooth, gentle notes are rendered beautifully, avoiding the harshness or discomfort that higher-pitched treble can sometimes introduce.
Mid-range
In the Cover of Selapas Kau Pergi by The Macarons Project, mid-range play well with treble. Both frequcnty travel gentle together to deliver a well balance score. The vibration of the guitar strangle can be clearly heard, but the clarity of vocal touch gentle just above the note.

The Enco Air4 presents a mid-range that is rich, gentle, tight, and transparent, although it is often overshadowed by the bass response. While this can sometimes be a drawback, there are instances where the mid-range shines.
In a cover like “Selepas Kau Pergi” by The Macarons Project, the mid-range performs admirably, working in tandem with the treble. Both frequency ranges travel gently together, creating a well-balanced sonic landscape. The subtle vibrations of the guitar strings are clearly audible, providing a sense of texture and realism. However, the clarity of the vocals, while present, sits just slightly above the underlying notes, indicating a slight prioritization of the instrumental elements over vocal presence in certain tracks.
Bass
The bass is undoubtedly the strongest element of the Enco Air4’s sound signature, exhibiting a depth and impact uncharacteristic of earbuds in this price range. It’s powerful and deep, often spilling over into other frequencies.

While it shares similarities with the bass presentation of the Enco Air4 Pro, it doesn’t quite reach the same subterranean depths. However, the bass on the Air4 is impressive in its own right.
In tracks like “Shinunoga E-Wa” by Fujii Kaze, each beat drops with such low-end extension that the roll-off is almost perceptible. The bass is deep, low, and powerful, yet it avoids becoming muddy or indistinct. It possesses a noticeable texture, giving it a distinct character and preventing it from blending into a homogenous low-end rumble. This textured, impactful bass is a standout feature of the Enco Air4.
Sound stage
The Enco Air4 offers a soundstage typical of most earbuds. It provides a sufficient sense of space and separation, but doesn’t deliver any significant surprises or exceptionally wide imaging.

The sound doesn’t feel overly cramped or congested, but it also doesn’t extend far beyond the listener’s head. It strikes a balanced point that allows for enjoyable personal listening sessions, providing enough space for individual instruments and vocals to breathe without creating a truly immersive or expansive soundscape.
It’s a functional, if not remarkable, soundstage that serves its purpose for everyday listening.
Conclusion
In conclusion, the Oppo Enco Air4 presents a compelling package, especially considering its price point of RM249. While it may not boast the highest-end codecs or the most expansive soundstage, it delivers a surprisingly enjoyable listening experience.

The strong, textured bass is a definite highlight, providing impactful low-end that punches above its weight class. The gentle treble and mid-range, while occasionally overshadowed by the bass, contribute to a generally pleasant and balanced sound, particularly well-suited for genres like acoustic, synthwave, and pop.

Although the treble has some limitations in the highest registers, and the mid-range can sometimes be recessed, the overall tuning makes for comfortable and engaging listening.

For RM249, the Oppo Enco Air4 offers a good listening experience. With that we award it with our silver metal and would recommend this earbud for those who seek for an good budget-friendly true wireless earbud marke.
If you want to learn more about the Oppo Enco Air4 Pro, check out our review here:
Also if you are looking to compare the Oppo Enco Air4 Pro and Enco Air4, check out our comparison article here:
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- Oppo Enco Air4 (Shopee): https://s.shopee.com.my/4q0C9hTGsA?share_channel_code=1
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