Oppo Enco Free 4 VS Oppo Enco X3s

From a design standpoint, the Oppo Enco Free 4 and Oppo Enco X3s are virtually identical across every measured spec in this category. Both are true wireless, in-ear earbuds weighing exactly 9.4 g per earbud, carry an IP55 rating for water and dust resistance, and share the same feature set — no neckband, no wingtips, no RGB lighting, no display, and stereo audio output.

The IP55 rating is worth noting for real-world context: it provides solid protection against low-pressure water jets from any direction and dust ingress, making both suitable for workouts and light rain, though neither is rated for submersion. At 9.4 g, both sit at a comfortable, lightweight point that should allow for extended wear without fatigue.

Based strictly on the provided design specs, these two products are in a complete tie. There is no differentiating factor in this category — a buyer choosing between them on design alone will find no meaningful distinction.

Both earbuds share a solid sound quality foundation: an 11 mm driver, active noise cancellation, and passive noise reduction. Where they diverge is in frequency response and spatial audio capability — and those differences are meaningful. The Enco Free 4 covers the standard 20 Hz–20,000 Hz range, which maps precisely to the limits of human hearing. The Enco X3s extends that range significantly, down to 15 Hz at the low end and all the way up to 40,000 Hz at the top.

In practice, the sub-20 Hz extension on the X3s adds more physical bass presence and rumble, which audiophiles often describe as feeling the sound rather than just hearing it. The high-frequency extension into the ultrasonic range (40 kHz) primarily benefits hi-res audio formats, where the wider headroom can contribute to a more natural, airy top end even within audible frequencies. Additionally, the X3s supports spatial audio, which the Enco Free 4 lacks entirely — this enables a more three-dimensional, immersive soundstage, particularly relevant for music and video content mixed for that format.

The Enco X3s holds a clear edge in this category. Its broader frequency range and spatial audio support represent tangible, real-world advantages for listeners who prioritize audio fidelity and immersion, while the Enco Free 4 covers only the audiophile baseline.

On paper, the power story for these two earbuds is nearly identical: both deliver 11 hours of playback per charge, 6 hours with ANC active, and a combined 34 hours with the case — numbers that comfortably cover a full workday or long-haul flight. The 62 mAh earbud battery and 530 mAh case capacity are also identical, so total energy reserves are a dead heat.

The two separating factors are charging speed and wireless charging. The Enco Free 4 charges in just 0.85 hours — under an hour — compared to the Enco X3s's 2 hours. That is a substantial real-world difference: if you are topping up during a commute or lunch break, the Free 4 will be ready far sooner. The X3s counters with wireless charging support, which the Free 4 lacks. For users with a Qi pad on their desk, the convenience of simply dropping the case down — no cable required — can meaningfully reduce daily friction, even if the charge itself takes longer.

Neither product wins this category outright; it comes down to usage pattern. The Enco Free 4 suits users who need fast, cable-based top-ups, while the Enco X3s appeals to those who prioritize cable-free convenience and are less concerned about charge duration.

Connectivity is largely a tie between these two — both run Bluetooth 5.4, support LDHC and AAC codecs, charge via USB-C, and share the same absence of aptX variants, LDAC, LE Audio, and NFC pairing. LDHC is a high-res wireless codec capable of transmitting at high bitrates, so both earbuds are on equal footing when it comes to audio transmission quality over Bluetooth.

The one concrete differentiator is maximum Bluetooth range: the Enco Free 4 is rated to 40 m, while the Enco X3s is rated to just 10 m. In practical terms, this matters for users who frequently leave their phone in one room while moving around — the Free 4 offers considerably more freedom before the connection becomes unstable. The X3s's 10 m rating is adequate for typical seated or desk use, but noticeably limiting by comparison.

The Enco Free 4 takes a clear edge here solely on the strength of its 4× greater Bluetooth range. For users who value staying connected at a distance — in the gym, around the home, or in an office — that gap is a tangible, real-world advantage that the X3s cannot match on this spec alone.

Across most of the features list, these two earbuds are functionally identical — both offer ambient sound mode, fast charging, mute, headset use, on-device controls, voice prompts, and a bundled travel bag. For everyday usability, that shared foundation is solid and well-rounded.

The single differentiating feature is the built-in translator, which the Enco Free 4 includes and the Enco X3s does not. For frequent travelers or users who regularly communicate across language barriers, real-time translation built directly into the earbuds removes the need for a separate app or device — a genuinely useful convenience in the right context.

The Enco Free 4 holds the edge here by virtue of that one exclusive capability. It is a niche advantage, but for the users it targets, it is a meaningful one. Those who have no use for translation will find both products completely equivalent in this category.

Microphone hardware is a complete match between these two earbuds. Both carry 6 microphones and feature noise-canceling mic technology — a configuration that, across the industry, is typically associated with multi-mic beamforming arrays designed to isolate voice while suppressing wind, crowd, and ambient noise during calls.

A 6-mic setup is on the higher end for true wireless earbuds, and combined with active noise cancellation on the mic side, both products are well-equipped for calls in noisy environments. There is no data here to suggest any difference in implementation or call quality performance between the two.

This category is a complete tie. Buyers prioritizing call quality and voice pickup will find no distinguishing factor between the Enco Free 4 and the Enco X3s based on the available microphone specifications.