Sudio E4 Pro
True Wireless ANC Earbuds
- Sound Quality
- 3.5
- Call Quality
- 4.5
- Battery Life
- 4.5
- Connectivity
- 4.5
Sudio has been quietly building a reputation as a brand that punches above its price point — clean Scandinavian aesthetics, solid audio engineering, and features that used to cost significantly more. The E4 Pro continues that tradition but with a few choices that deserve honest examination. It leads with Bluetooth 6, one of the most current wireless standards available in consumer earbuds today, while simultaneously skipping codec options that audiophiles consider table stakes. Whether that trade-off works for you depends entirely on how you use earbuds day to day.
Design and Build: Understated and Practical
Physical experience, fit, and build quality
The E4 Pro takes the in-ear true wireless form — both earbuds completely cable-free, housed in a charging case that travels with you. There are no neckbands, no ear fins, and no wingtip attachments. That last point is worth flagging: without optional wingtips, the fit relies entirely on eartip seal and the natural geometry of the ear canal. For most people this is fine; for those with active lifestyles involving running or intense gym work, it is something to consider before purchasing.
The sweat resistance rating means the E4 Pro handles workouts and unexpected light rain without concern — but it is not waterproof, and submersion or heavy rainfall is outside its design intent.
About the charging case
The case charges via USB-C and also supports wireless Qi charging — both options in a single accessory. A travel bag is included, a thoughtful addition that many competitors omit at this price tier. There is no display on the case, no RGB lighting, and no UV sanitation — deliberate omissions that keep the product focused rather than feature-bloated.
Sound Quality: Capable Drivers, Some Codec Caveats
Driver performance, frequency range, and wireless audio quality
Driver Performance
Each earbud uses a 10-millimeter dynamic driver — a size that sits in the mainstream sweet spot for in-ear form factors. Smaller drivers tend to struggle with bass body; larger drivers can introduce resonance issues in compact housings. At 10mm, the E4 Pro has the physical foundation for a balanced, full-range sound.
The frequency response spans the full range of human hearing, meaning the tuning is capable of reproducing everything from deep bass rumble to the highest audible treble. A 24 Ohm impedance paired with the driver's sensitivity means the E4 Pro is straightforward to drive and performs consistently whether connected to a phone, tablet, or laptop — no special amplification needed.
For enthusiasts: The driver uses a standard magnet configuration rather than neodymium. Neodymium magnets are typically associated with stronger magnetic flux and tighter transient response. This doesn't automatically mean the E4 Pro sounds worse — driver tuning and housing design matter enormously — but it is a component choice worth knowing.
The Codec Question
Here is where the E4 Pro deserves a direct conversation. The earbuds run on Bluetooth 6 — the newest generation of the standard — but audio codec support is limited to SBC, the baseline fallback codec built into all Bluetooth devices. There is no AAC for iPhone users, no aptX for Android listeners seeking higher audio quality, and no LDAC for high-resolution wireless playback.
Fine for everyday listening
Podcasts, playlists, calls, background music — SBC handles all of it without issue. Most listeners never notice the difference from AAC in typical daily conditions.
A step back for critical listeners
If you stream at high quality settings and come from AAC-capable earbuds, this is a real regression in the wireless audio chain. LDAC users should look elsewhere entirely.
Spatial audio, Dolby Atmos, and Dirac Virtuo are all absent. The E4 Pro is a stereo earphone and stereo is what it does — without the virtual surround processing found in some competing products at this tier.
Active Noise Cancellation: Tuned for the Real World
How ANC and ambient mode work in practice
The E4 Pro pairs active noise cancellation with passive isolation — two complementary approaches working together. Passive isolation comes from the physical seal of the eartip in the ear canal, blocking higher-frequency sounds like traffic and chatter through simple acoustic physics. Active noise cancellation uses microphones and processing to generate anti-noise signals that tackle lower-frequency sounds — engine rumble, HVAC hum — that physical barriers struggle to address.
The combination means the E4 Pro handles commuting and office noise without requiring the listener to push the volume up. On flights, where low-frequency cabin engine drone is the dominant noise, ANC performs at its best.
Call Quality: Four Microphones Doing Real Work
Microphone setup, remote work functionality, and voice clarity
The E4 Pro is equipped with four microphones in total, paired with noise-canceling microphone processing. More microphone elements allow for more sophisticated beamforming — the ability to focus on the speaker's voice while suppressing ambient noise picked up around it. For a two-earbud configuration, four mics means at least two per side, which is the current standard for earbuds that take call quality seriously.
The mute function is a practical addition for anyone in work-from-home or hybrid office environments — toggling the microphone off during a call without fumbling with a phone or laptop is genuinely useful. The E4 Pro fully supports headset use, meaning video conferencing platforms, VoIP applications, and mobile calls all function without issue.
Battery Life: All-Day Coverage With Smart Charging
Endurance, charging options, and real-world daily use
The earbuds deliver six hours of continuous playback per charge. The case holds enough reserve to top up the earbuds four full times, bringing the combined total to 30 hours. For a standard work week of moderate daily listening, this is a realistic five-day run without hunting for a cable.
Wireless charging adds a layer of everyday convenience — the case charges from any Qi pad, or from a USB-C cable when speed matters more. A battery level indicator on the case eliminates surprise dead-case moments before a long commute or flight.
Connectivity: Bluetooth 6 and Multipoint Pairing
Wireless standard, device range, and simultaneous connections
Bluetooth 6 is the newest generation of the standard. The practical benefit for most users is improved connection stability and reduced interference — particularly relevant in crowded wireless environments like airports, offices, and public transit. The rated wireless range reaches 15 metres, meaning movement from a desk to an adjacent room stays well within specification.
Multipoint connectivity allows the E4 Pro to maintain an active connection to two devices simultaneously — typically a phone and a laptop. Switching between a video call on a laptop and an incoming phone call happens automatically, without manually disconnecting and reconnecting.
What is included
- Bluetooth 6 — the latest generation
- Two-device simultaneous multipoint
- USB-C and wireless Qi charging
- 15-metre wireless range
- Case battery level indicator
What is absent
- AAC codec — relevant for iPhone users
- aptX, aptX HD, or LDAC
- NFC pairing or Google Fast Pair
- Automatic in-ear detection
- Find My Earbuds feature
Who Should Buy the Sudio E4 Pro
Honest buyer profiles and real-world use cases
This is for you if...
- You commute daily or work in open offices and want effective ANC that lasts a full day
- You take frequent video and voice calls and need reliable microphone performance
- You constantly move between a phone and a laptop and find manual device switching frustrating
- You want wireless charging included without paying a premium for it
- You prioritize clean, stable wireless connection over high-resolution codec support
Look elsewhere if...
- You use an iPhone and notice the difference between AAC and SBC at high stream quality settings
- You use an LDAC-capable Android device for high-resolution wireless audio
- You run or train intensively and depend on wingtips for a secure fit
- Auto-pause on ear removal is a feature you actively rely on
- You want spatial audio or 3D immersive sound processing
How It Compares to the Competition
Sudio E4 Pro versus typical alternatives at the same price tier
| Feature | Sudio E4 Pro | Budget ANC Class | Mid-Range Audio Focus |
|---|---|---|---|
| Bluetooth Version | 6.0 | 5.3 | 5.2 – 5.3 |
| Active Noise Cancellation | |||
| Ambient Mode | Sometimes | ||
| Wireless Charging | Rare at this tier | Often extra cost | |
| Multipoint Devices | 2 | 2 | 2 |
| AAC Support | Usually yes | ||
| aptX Support | Rare | Sometimes | |
| Microphones | 4 | 2 – 4 | 4 – 6 |
| Travel Bag Included | Rarely |
Competitor columns represent typical category characteristics, not specific named products.
Honest Strengths and Real Limitations
What the E4 Pro genuinely delivers — and where it makes calculated trade-offs
The E4 Pro's engineering priorities are clear: connection quality, call performance, and practical convenience first. Bluetooth 6 is not cosmetic — newer connection architecture genuinely reduces dropout and interference, and this advantage grows as more wireless devices compete for spectrum. Wireless charging on a mid-range earbud is still far from universal, and including it alongside fast charging and a high-capacity case makes the E4 Pro easy to live with day after day.
The four-microphone call system with on-device mute is one of the strongest practical assets in the package. More people use wireless earbuds as their primary work headset than ever before, and the E4 Pro treats this as a central use case rather than a secondary one. Voice prompts, headset compatibility, and clean call processing reinforce this positioning throughout.
Where the compromise is most felt
The codec situation is the most significant limitation and the one that stings most for informed buyers. Implementing Bluetooth 6 — a newer, higher-bandwidth standard — while omitting even AAC is a pairing that raises real questions. The newer wireless architecture supports richer codec throughput, and not leveraging that for at least AAC feels like an incomplete implementation. The absence of in-ear detection and a find-my-earbuds feature are smaller gaps, but they are gaps that competing products at this tier have closed.
Common Questions Answered
What real buyers search for before purchasing
Final Verdict
The Sudio E4 Pro is a well-considered product for a specific type of buyer: someone who wants a reliable, modern true wireless earbud that excels at calls, handles ANC effectively, connects to multiple devices without friction, and charges conveniently through multiple methods.
The Bluetooth 6 implementation is a genuine differentiator, and the four-microphone call system is one of its strongest practical assets. For everyone outside the audiophile segment, the listening experience on SBC through Bluetooth 6 is clean and stable.
The codec story remains its most significant limitation — one that matters most to audiophiles and Apple ecosystem users. For everyone else, the practical feature set makes the E4 Pro a strong and well-rounded daily companion.
Editor's Score
