TL;DR: The OPPO Enco X4 pairs a dual-driver, dual-DAC design with excellent Dynaudio tuning, much better ANC and real lossless audio on Find X phones. Sound is the star. Battery life with ANC on and features that only work on OPPO phones hold it back, but music lovers will be very happy with it.
Flagship earbuds have become a crowded room, and most of them sound like they came from the same tuning department. Everyone has ANC, everyone has an app with an EQ, and everyone claims “rich bass and crisp highs” in a font that looks like it costs extra. The OPPO Enco X4 gets past that by doing a few things properly: a real two-way driver setup, a sixth year of tuning with Dynaudio, and actual lossless Bluetooth when it’s paired with the right phone. For me, the sound is the main reason to look at these, and the part I keep coming back to. OPPO has made earbuds that care about music first and checklist features second, though the checklist is still very long.
The catch is the same one you get with every brand that owns phones too. The Enco X4 works best with an OPPO Find X10 Series handset, and several of its cleverest features are reserved for ColorOS users. On an iPhone or a non-OPPO Android phone you still get excellent earbuds, but you don’t get everything OPPO advertises. That shapes who should buy these, and I’ll come back to it.
Two drivers, two DACs and a Dynaudio tuning that does the heavy lifting
Inside each earbud are an 11mm woofer with a TRF diaphragm and a 6mm planar tweeter, each one fed by its own DAC. It’s the woofer-and-tweeter idea from proper hi-fi speakers, shrunk down to fit in your ear. Splitting the work matters because one small driver doesn’t have to stretch from deep bass to sparkling treble and make compromises at both ends. OPPO says the woofer has 67% more low-frequency driving power than the Enco X3s, and you can hear it in the sound: bass with weight and warmth that doesn’t flood the midrange. The planar tweeter is the more interesting part to me. Planar drivers have a reputation for fast, detailed highs, and here they give cymbals and string textures air without getting harsh.
The Dynaudio partnership is the steady hand on top of all that. You get five co-developed sound profiles: Dynaudio Original Sound, Dynaudio High-Resolution, Pure Vocals, Crisp Highs and Thundering Bass. I’d call Original Sound the sensible default because it’s balanced and natural and doesn’t push any part of the frequency range too hard. High-Resolution is the one for focused listening, with extra clarity and detail. If you want full control, Sound Master EQ gives you a 10-band equaliser and lets you import and share presets, which is a lovely touch for audio nerds who enjoy fiddling as much as listening.
Lossless audio on the OPPO Enco X4 is real, but it’s tied to OPPO phones
This is OPPO’s first pair of earbuds with lossless transmission. It uses the LHDC Lossless codec at up to 2.3Mbps and handles audio up to 24-bit/48kHz, and the earbuds also carry Hi-Res Audio Wireless certification. On paper that’s a real step beyond the compressed streams most true wireless earbuds live on. Paired with a Find X Series phone, the chain from phone to ear is lossless from end to end, which means that if your library is in good shape, more of the texture and layering in the recording survives the trip. It’s off by default, so turn it on in the Bluetooth settings first, before you judge the sound.
Now the fine print. LHDC doesn’t have the support on phones that LDAC or aptX have, and iPhones stay on AAC, so most people outside OPPO’s own phones won’t get the headline feature. The good news is that the drivers and tuning are strong enough that the Enco X4 still sounds excellent without it. Lossless is the cherry on top, not the cake. Cross-platform spatial audio with head tracking also deserves credit, because it works on any phone brand, with Off, Fixed and Head Tracking modes for movies and immersive mixes.
Noise cancellation finally matches the sound quality
ANC has been where OPPO earbuds held back in the past, and the Enco X4 is a clear attempt to fix that. Three microphones per earbud, a 6nm NPU and new algorithms work together, and OPPO says overall noise cancellation is 100% better than the Enco X3s, with 30% stronger cancellation at speech frequencies. That second number is the one I care about more. Engine drone is the easy part, and chatter and voices are where a lot of earbuds give up. The new Adaptive Mode adds AI scene recognition for subways, planes, trains, taxis and streets, so the balance between cancellation and transparency shifts as your surroundings change.
The ear tips do a lot of the quiet work. OPPO redesigned them using data from more than 2,800 ear canal scans, made them from a foamed silicone that compresses to fit the ear more naturally, and ships four sizes. A good seal is also the basis for good bass and good passive isolation, so the tips feed directly into how the Enco X4 sounds as well as how quiet it gets. Conversation Awareness rounds things off: it uses the VPU to detect when you start talking, then lowers the music and switches to full transparency. It’s off by default, but it’s well worth turning on if you’re tired of pulling an earbud out every time someone talks to you.
Calls, controls and a pile of smart features
Calls get the same three-mic and NPU setup, with AI noise reduction that separates your voice from background noise like traffic and station announcements. Bluetooth 6.1 and dual connection across Android, iOS and Windows make the Enco X4 easy to live with day to day, and switching from a laptop to an incoming phone call takes no effort. The controls have clearly marked press and swipe areas, which helps with the usual problem of accidental taps. Head gestures let you nod to answer a call or shake your head to reject one, and it’s one of the few earbud gimmicks I’d actually use with a coffee in one hand and a bag in the other. Spotify Tap and Gemini access from the earbuds finish off a solid set of hands-free tricks.
After that, the features lean heavily on OPPO’s ecosystem. AI Live Translation needs ColorOS 17 or later on supported OPPO and OnePlus phones, Neck Health posture tracking is OPPO and OnePlus only, and Clear Audio Recording, which uses both earbuds as a Dolby-powered stereo mic for vlogging, is built around Find X phones. Smart Bluetooth’s claimed 400-metre range in open spaces also needs selected OPPO or OnePlus phones. None of these are fake features, but they’re bonuses only some buyers will get. If you’re on a Pixel or an iPhone, judge the Enco X4 on its sound, ANC and call quality, and treat everything else as extra content you can’t download.
Design and battery life: tasteful finish, honest numbers
OPPO went quietly premium with the look. The buds mix matte and glossy textures, add a polished star ring with a laser-engraved Dynaudio logo, and come in Glacier White or Aurora Violet. Each bud weighs about 5.6g, and the case, with its metallic-finish edges, holds the full set at around 50.9g. The earbuds are rated IP55, which is reassuring for sweaty runs and surprise rain, although the case has no protection, so don’t leave it in a gym bag next to a leaking water bottle. Wireless charging is only available in some markets, so check your local model before assuming it’s there.
The battery claims need a careful read. The headline figures of 13 hours from the buds and 53 hours with the case are measured with ANC off. Turn noise cancellation on and OPPO’s own numbers drop to 6 hours from the buds and 26 hours with the case. That’s perfectly good for the category, but it’s half the number on the box, and most people buying flagship ANC earbuds will leave ANC on. Fast charging helps a lot: ten minutes gives about 14 hours of total playback with the case, under OPPO’s test conditions.
Who the OPPO Enco X4 is for, and who should skip it
If you own a Find X10 Series phone, or another recent OPPO or OnePlus handset, these are an easy recommendation. You get the full package: lossless audio, translation, the stereo recording trick and stronger Bluetooth range, all on top of earbuds that already sound great. Android users on other brands still get the dual-driver hardware, the Dynaudio profiles, the 10-band EQ through HeyMelody, spatial audio, multipoint and much better ANC. For them it’s still a strong option if sound quality matters more than ecosystem extras. Audiophiles who like tuning their own sound will especially enjoy the EQ preset sharing.
iPhone owners are the group I’d hesitate over. You’ll get great sound over AAC, but you lose lossless and most of the AI features, and the convenience of something built into Apple’s ecosystem is hard to beat. Anyone who needs a weatherproof case or very long battery life with ANC on should also think twice. The Enco X4 is a music lover’s earbud first, and it rewards people who sit down and actually listen.
Verdict
The OPPO Enco X4 is the best-sounding pair of Enco earbuds I’ve covered. The woofer-and-planar-tweeter design with two DACs isn’t just marketing. It gives you full, warm bass and detailed, airy highs, and the Dynaudio tuning keeps everything natural and musical. Noise cancellation is finally at flagship level, and the comfort-focused ear tips plus Conversation Awareness make the earbuds easy to wear for a whole day.
What holds it back from a higher score is how locked to OPPO phones much of the feature list is, battery life that halves once ANC is on, and a case with no water resistance. Lossless audio is a real highlight, but only for people with the right phone. For OPPO and OnePlus owners this is close to a no-brainer, and for anyone else on Android who cares mostly about sound it’s still easy to recommend.
