How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want one headset that does double duty as a wired work tool and an ANC headset you never have to charge, choose EPOS Impact 400; if you need true wireless earbuds with the strongest noise cancellation numbers here, all-day battery and AI call recording, choose Nothing Ear Noise Cancelling.
• EPOS Impact 400 — biggest strength: A wired, plug-and-play USB-C headset built for calls, with hybrid ANC, four AI-powered microphones, a Teams button and work-focused smart features like lift-to-mute and a busy light.
• EPOS Impact 400 — biggest trade-off: It's wired only, on-ear, and at 385 g it's a sit-at-your-desk tool rather than something you'd wear walking around.
• Nothing Ear Noise Cancelling — biggest strength: Wireless earbuds with up to 45 dB hybrid ANC, a 12 mm dynamic driver, Bluetooth 6.0 dual-device connection and up to 42 hours of total listening with the case.
• Nothing Ear Noise Cancelling — biggest trade-off: You're dependent on battery and Bluetooth, and it tops out at a 1-year manufacturer warranty versus EPOS's 2-year coverage.
• Who each pick is for: EPOS Impact 400 for the desk-bound professional living in video calls; Nothing Ear Noise Cancelling for the mobile user who wants one pair of buds for commuting, travel, gym and the occasional meeting.
The Impact 400 is unapologetically a work headset. Everything about it points at one job: making you sound clear on calls in a noisy room. The four AI-powered microphones are designed to isolate your voice and push down nearby chatter, which is exactly the problem in an open-plan office or a shared kitchen table. On top of that, hybrid active noise cancellation reduces what reaches your ears, so you can actually concentrate while someone else is talking two desks away.
The smart features are where it earns its place on a work desk. Lift-to-mute means you mute by simply lifting the boom — no fumbling for a button mid-sentence. The busy light signals to people around you that you're on a call. Talk-through mode lets you hear someone without taking the headset off. And there's a dedicated Teams button on this ANC version, which matters if your whole day runs through Microsoft Teams.
Nothing Ear Noise Cancelling: Who It's For
The Nothing Ear Noise Cancelling (Ear 3a) is the opposite philosophy: small, wireless, and built to go everywhere with you. The headline number is up to 45 dB of wideband hybrid ANC, with the buds recalibrating constantly to block a wide range of noise up to 5000 Hz. That's a serious figure on paper, and it's the kind of spec that matters on a plane, a train or a noisy café. Transparency Mode flips you back to the world without removing the buds, and there are three ANC strength modes so you're not locked into one setting.
Sound is handled by a 12 mm dynamic driver with an aerospace-grade diaphragm, tuned for deeper bass than its predecessor and labelled Hi-Res Audio. In the Nothing X app you get bass, treble and vocal boosts plus an advanced 8-band EQ, so you can shape the sound rather than accept it. Static Spatial Audio widens things out for gaming and streaming, and Low Latency mode keeps audio in sync.
For calls it's well equipped: six microphones with Clear Voice Technology, plus genuinely unusual extras — Audio Snapshot and call recording, saving up to a minute of media or up to two hours of calls, with AI sorting and transcription in the app. Note that call recording is only available in supported countries due to local regulations. Battery is a strength: 10 hours per bud with ANC off, 6 with ANC on, and 42 hours total with the case, plus an hour of playback from a five-minute charge. Bluetooth 6.0 handles dual-device connections across iOS and Android, and one-touch AI features like ChatGPT are built in. Four pairs of ear tips (XS through L) and a status-bar case round it out. Skip it if you want a wired, always-ready headset or the longest possible warranty. Buy it if you want one pair of buds for everything else.
Side-by-Side: Which Should You Choose?
• Best for clear calls in a noisy office → EPOS Impact 400. Four AI-powered mics, a boom, lift-to-mute and a busy light are purpose-built for exactly this.
• Best for battery freedom → Nothing Ear Noise Cancelling. Up to 42 hours with the case, 10 hours per bud without ANC.
• Best for never thinking about charging or pairing → EPOS Impact 400. It's wired USB-C, so it's always ready the moment you plug in.
• Best for travel, sport and commuting → Nothing Ear Noise Cancelling. In-ear, wireless, 40.92 g with the case, Bluetooth 6.0 with 15 m range.
• Best for long desk sessions → EPOS Impact 400. Padded headband, soft noise-dampening cushions, and a design made for all-day wear while seated.
• Best for recording and transcribing meetings → Nothing Ear Noise Cancelling. Call recording plus AI transcription and speaker identification in the app.
• Best for warranty coverage → EPOS Impact 400. 2-year manufacturer warranty versus 1 year on the Nothing buds.
In my opinion, these two barely compete — they solve different problems, and the right answer is whichever problem is actually yours. If your working day is a carousel of Teams calls and you want zero pairing, zero charging and maximum voice clarity, I'd buy the EPOS Impact 400 without hesitating. If your day is split between a commute, a desk and a gym bag, and you want one set of buds to cover all of it, I'd buy the Nothing Ear Noise Cancelling. Forced to pick one for a general buyer, I'd lean Nothing — it simply does more things, in more places. But if calls are the job, EPOS wins.
For dedicated work calls, the EPOS Impact 400 is the more purpose-built option — four AI-powered microphones, lift-to-mute, a busy light and a Teams button. The Nothing buds are strong on calls too, with six mics and Clear Voice Technology, but they're designed for mixed use rather than as a primary work tool.
Do the Nothing Ear Noise Cancelling earbuds have better noise cancellation than the EPOS Impact 400?
The Nothing buds run 10 hours per bud with ANC off and 6 hours with ANC on, plus up to 42 hours total with the charging case, and a five-minute charge gives about an hour of playback. The EPOS Impact 400 is wired, so it has no battery at all — it draws power over USB-C.
Value depends on what you need. The EPOS Impact 400 gives you a wired, always-ready headset with a 2-year warranty and work-specific features. The Nothing buds give you wireless freedom, stronger ANC numbers, a 12 mm driver and 42 hours of use, but a 1-year warranty. Check the current price on Amazon for both and match it to how you'll actually use them.
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