Anker Soundcore by Anker Space A40 Auto-Adjustable Review

The Space A40 has the best noise cancellation (100th percentile) you can get for under $100. Sound and comfort are also top-tier (94th and 97th percentile). Just know the battery life is below average (17th percentile) and calls aren't its strong suit. For the price, it's an acoustic steal.

The Anker Soundcore Space A40 is a data anomaly. It scores in the 100th percentile for active noise cancellation in our database, which is a fancy way of saying it's as good as it gets for blocking out the world. Pair that with a 97th percentile comfort score and a 94th percentile for sound quality, and you've got a set of earbuds that punches way, way above its typical $45-$100 price tag.

But the numbers don't lie about its weaknesses, either. The battery life sits at the 17th percentile, which is a real trade-off for that top-tier ANC. And if you take a lot of calls, be warned: the microphone performance lands in the 43rd percentile. This is a product of clear, data-driven compromises.

Let's talk about that 100th percentile ANC. In practice, it means these earbuds are elite at silencing constant low-frequency hums like airplane engines, air conditioners, and traffic. The adaptive feature works well, adjusting the cancellation based on your environment so you don't have to fiddle with an app. For sound, the 94th percentile score comes from those double-layer diaphragm drivers and support for LDAC codec, delivering Hi-Res Audio Wireless with strong, detailed bass and clear highs. The 94th percentile connectivity score, thanks to Bluetooth 5.0 and multipoint pairing, means stable connections and easy switching between devices.

Here's where the Space A40 shines. For a product that typically costs between $45 and $100, scoring above the 94th percentile in core areas like ANC, sound, and comfort is almost unheard of. You're getting performance that rivals earbuds twice the price. The value proposition is simple: sacrifice some battery life and call quality to get near-flagship-level noise cancellation and audio fidelity on a tight budget.

Stacked against the competition, the data tells a clear story. The Sony WF-1000XM5 and Bose QuietComfort Earbuds might edge it out in pure refinement and call quality, but they cost over twice as much. The Nothing Ear (a) and JBL Tune Flex compete more directly on price, but neither touch the Space A40's 100th percentile ANC or 97th percentile comfort scores. The Anker Soundcore P3i is a closer sibling, but the Space A40's adaptive ANC and LDAC support give it the audio edge. It's the budget king for noise isolation.

Skip these if you're on marathon conference calls or need all-day battery without a recharge. The 43rd percentile mic score means there are far better options for voice clarity, and the 17th percentile battery ranking means you'll be hunting for a USB-C cable more often than with most competitors. Also, if you demand the absolute pinnacle of sound detail regardless of price, the Sony WF-1000XM5 is still the king, but you'll pay for it.

If your top priorities are blocking out noise and listening to great music without breaking the bank, the Space A40 is a data-backed no-brainer. Its weaknesses are specific and quantifiable: you'll charge the case more often, and you shouldn't rely on it for important calls. But for sheer ANC performance and comfort at this price, nothing in our database beats its percentile rankings. It's a targeted triumph.