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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a fully wireless, hi-res-certified everyday pair with serious noise cancelling, choose OPPO Enco X3s; if you need a wired, plug-and-play hi-res set with an inline mic and zero charging, choose HIFI WALKER A1.
• OPPO Enco X3s — biggest strength: LHDC 5.0 Hi-Res Audio certification with a Dynaudio-tuned profile, dual dynamic drivers plus dual DACs, and 55dB hybrid ANC. This is a hi-res audio earbud that also cancels the world around you.
• OPPO Enco X3s — biggest trade-off: It's wireless only (no 3.5mm jack), so you're dependent on Bluetooth and charging. Touch controls also ask you to learn gestures.
• HIFI WALKER A1 — biggest strength: A wired 3.5mm connection with an aluminum shell, hybrid dual drivers and a push-button inline control with mic. No battery, no pairing, no latency.
• HIFI WALKER A1 — biggest trade-off: Wired only. Passive noise cancellation means it blocks sound by eartip seal, not electronics, and there's no ANC or playtime spec because it draws power from your device.
• Choose OPPO Enco X3s if you want hi-res sound on the move, on a plane, or in a noisy office, and you'd rather not deal with a cable.
• Choose HIFI WALKER A1 if you work at a PC or laptop, take calls, game, and want a cable you can trust to just work.
The Enco X3s is the more technically ambitious of the two. OPPO built it around LHDC 5.0 Hi-Res Audio certification, co-engineered with Dynaudio for an exclusive "Dynaudio Featured" sound profile. In plain terms, that means the earbuds are designed to carry a higher-resolution wireless stream than a standard Bluetooth codec, with the tuning handled by people who voice luxury car systems. Whether that matters to you depends on your source: if you're streaming from a phone that supports LHDC, you get the full benefit; if not, you still get the tuning and the hardware.
The driver setup is genuinely unusual for the category. There's an 11mm dynamic driver handling bass and a separate 6mm planar tweeter for the highs, each paired with its own high-resolution DAC. That split-driver arrangement is the kind of thing you usually see in wired in-ears and full-size headphones, not true wireless buds. It's the reason the spec sheet can credibly talk about deep bass and crisp highs without one smearing the other. Add 55dB hybrid active noise cancellation across a claimed 5500Hz range and you have a pair built for planes, trains and open-plan offices.
Battery is where it earns its keep for travelers. OPPO rates 11 hours per charge, dropping to 9 hours when you're running LHDC, and up to 45 hours total with the wireless charging case. It's also IP55 rated for dust and heavy rain, and Bluetooth 5.4 with a 10-meter range keeps the connection modern. The frequency range is listed as 20Hz–5500Hz, which is the ANC band rather than the audio band — worth knowing so you don't misread it.
Buy it if you want one pair for commuting, flying, the gym and calls, and you value active noise cancelling plus hi-res wireless audio in the same package. Skip it if you need a wired connection for a desktop setup, or you'd rather press a button than tap a touch surface — the Enco X3s uses touch controls exclusively and has no headphone jack. It's also worth checking the current price on Amazon before you commit, since it sits in a different tier than the A1.
The A1 is the opposite philosophy, executed well. It's a wired in-ear with a 3.5mm jack, so it plugs into a PC, laptop, tablet, smartphone or gaming handheld and simply works. There's no pairing, no codec negotiation, no battery to think about, and no charging case to remember. For anyone whose listening happens at a desk, that's a real advantage — a wired connection sidesteps Bluetooth latency entirely, which matters for gaming and for watching video where lip-sync drift is annoying.
HIFI WALKER lists hybrid dual dynamic drivers inside an aluminum shell in Space-Gray. The metal housing is the detail I'd focus on: aluminum resists the flex and rattle you get from cheap plastic housings, and it gives the A1 a more substantial feel than its price-adjacent rivals. The eartips are worth noting too — medium tips come pre-installed, and small and large spares are in the box, which is exactly what you want because in-ear fit is everything. A proper seal is what gives you the passive noise cancellation this model relies on, and it's also what gives you bass.
Controls are push-button with an inline mic, so volume and call handling are physical and tactile. You can answer a call, adjust volume and pause without looking at a screen or remembering a gesture. The mic is the headline for anyone who spends their day on Teams, Zoom or Discord, and the wired connection keeps voice pickup stable. The trade-off is honest: no active noise cancelling, no battery spec because there isn't a battery, and no wireless freedom. You're tethered to your device, and you'll hear the cable if you move around a lot.
Buy it if you want a dependable wired hi-res in-ear for a computer, calls and gaming, and you like physical buttons. Skip it if you need ANC for flights, want to move around untethered, or you're allergic to cables.
Side-by-Side: Which Should You Choose?
• Best for wired hi-res and zero latency → HIFI WALKER A1. A 3.5mm jack means no codec, no lag, no pairing.
• Best for noise cancelling → OPPO Enco X3s. 55dB hybrid ANC across a 5500Hz range versus the A1's passive, seal-based isolation.
• Best for battery life and travel → OPPO Enco X3s. 11 hours per charge, 9 with LHDC, up to 45 hours with the case.
• Best for calls at a desk → HIFI WALKER A1. Inline mic plus push-button volume control, always ready, never needs charging.
• Best for gaming and video → HIFI WALKER A1. Wired audio avoids Bluetooth latency, and aluminum housings hold up to daily handling.
• Best for workouts and weather → OPPO Enco X3s. IP55 dust and water resistance covers sweat and heavy rain.
• Best for the gym-and-office-all-in-one buyer → OPPO Enco X3s. It's the more versatile pair across environments.
• Best for the plug-in-and-forget buyer → HIFI WALKER A1. Nothing to configure, nothing to charge.
If I were buying one pair for myself and my listening happened across commutes, flights and the gym, I'd take the OPPO Enco X3s. The combination of LHDC 5.0 hi-res audio, a Dynaudio-tuned dual-driver setup with dual DACs, 55dB hybrid ANC and 45 hours of total playback is a genuinely broad skill set, and IP55 means I wouldn't baby it. I'd pick the HIFI WALKER A1 without hesitation if my listening lived at a desk — for PC calls, gaming and video, a wired aluminum in-ear with physical controls and an inline mic is simply the right tool, and it never runs out of battery. Two different jobs, two different answers.
what is hi res headphones
Hi-res headphones are designed to reproduce audio at a higher resolution than standard playback, typically meaning they can handle extended frequency detail and, in wireless models, a higher-bitrate codec. The OPPO Enco X3s carries LHDC 5.0 Hi-Res Audio certification with dual high-resolution DACs. The HIFI WALKER A1 approaches it through a wired 3.5mm connection and hybrid dual dynamic drivers.
what is hi res audio headphones
It's the same idea phrased differently: headphones built to carry a higher-resolution audio signal without downsampling it as aggressively as ordinary gear. In practice you need both a capable source and a capable headphone. The Enco X3s needs a phone or player that supports LHDC to get the full benefit; the A1 relies on whatever your device's 3.5mm output delivers.
what are hi res headphones
They're headphones engineered for detailed, faithful reproduction rather than just loudness — better drivers, better digital-to-analog conversion, and a tuning that aims at natural tonality. OPPO's take here is a Dynaudio co-engineered sound profile with an 11mm dynamic driver plus a 6mm planar tweeter. HIFI WALKER's take is hybrid dual dynamic drivers in an aluminum shell.
which headphones support hi res lossless
Lossless matters most on a wired connection, which points to the HIFI WALKER A1 — its 3.5mm jack avoids Bluetooth compression entirely, so it can carry whatever your source sends. For wireless, the OPPO Enco X3s supports LHDC 5.0, a high-bitrate codec, but true lossless over Bluetooth still depends on your phone. Check the current price on Amazon before deciding.
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