Bose QuietComfort Ultra Earbuds review

CustomTune measures your ear canal and tunes cancellation to it, which is the reason in-ear works at all.

The verdict: In-ear cancellation depends almost entirely on seal, and Bose's CustomTune measures your specific ear and adapts to it, which is why these outperform earbuds that assume every ear is the same. Buy them if you want cancellation in something pocketable that will not flatten your hair before a meeting. Skip them if you sit at one desk all day, because over ear headphones cancel more, last longer per charge and are more comfortable for hours.

Best Noise Cancelling Earbuds

Bose QuietComfort Ultra Earbuds (2nd Gen), wireless noise cancelling earbuds with mic

~$299

Wireless noise cancelling earbuds with ActiveSense, CustomTune technology that analyses your ears and adapts the earbuds to their shape, and adjustable noise control including turning cancellation off entirely.

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Specifications

Spec	Detail
Cancellation	The best of any Bose wireless earbuds per Bose, using ActiveSense
Personalisation	CustomTune analyses your ears and adapts the earbuds to their shape
Noise control	Adjustable levels of cancellation, including off to conserve battery
Type	In-ear wireless with microphone

Specifications above come from Bose's published specifications. Treat pricing as approximate, since Amazon pricing moves.

What it does well

CustomTune addresses the real weakness of in-ear cancellation, which is that performance depends on the seal in your specific ear canal rather than on the processor.
Adjustable cancellation levels including fully off is genuinely useful, because a walk to the shops and a train journey need different amounts and full cancellation costs battery.
They are pocketable, which matters if focus happens in more than one place. Over ear headphones stay on a desk; earbuds go with you.
ActiveSense handles sudden loud sounds rather than only steady ones, which is the failure mode of simple cancellation in a busy environment.

Where it falls short

In-ear cancellation is fundamentally limited by seal. If the tips do not fit your ears properly, no amount of processing compensates, and tip fit is individual.
Battery per charge is far shorter than over ear headphones, so a full working day means at least one trip back to the case.
Speech is still the hard case, exactly as with over ear headphones, and voices at the next desk will get through.
Three hundred dollars is flagship money for earbuds, and cheaper earbuds remove much of the same steady noise.

What owners report

Published owner reports place these among the best in-ear cancellation available, with CustomTune drawing specific praise from people who had found other earbuds ineffective. Comfort reports are good, which is not universal for in-ear designs.

The recurring criticisms are battery life relative to over ear headphones and price. Reports repeatedly note that tip fit determines performance and that trying the supplied sizes properly is worth the ten minutes, which is the most actionable advice for anyone who buys them.

Who it suits

People who work in more than one place and want cancellation that travels.
Anyone who finds over ear headphones hot or heavy for long sessions.
Users who want to adjust cancellation level rather than have it on or off.

Who should skip it

Desk based workers who would be better served by over ear headphones.
Anyone whose ears do not seal well with in-ear tips.
People who need a full day on one charge.

Alternatives worth considering

Over Ear for Less

Bose QuietComfort Headphones, wireless Bluetooth over ear

~$249

Fifty dollars less for over ear cancellation with Quiet and Aware modes, more total noise reduction and far longer battery. The better choice if you sit at one desk.

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Cheaper for Apple Users

Apple AirPods Pro 3 wireless earbuds with active noise cancellation

~$190

A hundred and ten dollars less, and Apple states they remove up to twice the noise of AirPods Pro 2. The integration with Apple devices is the real argument if you already own them.

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For Voices

Loop Quiet 2 reusable ear plugs, up to 24 dB SNR

~$25

Twenty five dollars for broadband reduction that handles speech better than active cancellation. Nothing to charge and nothing to pair, and they solve the problem earbuds do not.

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Common questions

Earbuds or over ear headphones for focus?

Over ear cancels more and lasts longer per charge; earbuds are pocketable and cooler over a long session. If you work at one desk, over ear. If focus happens in cafes, trains and offices, earbuds. Neither solves conversation, which is the distraction most people are actually fighting.

What is CustomTune?

Bose measures the acoustics of your specific ear canal and adapts the cancellation and sound to it. Because in-ear performance depends so heavily on individual ear shape and seal, this addresses the real variable rather than adding more processing power.

Will they block my colleagues talking?

Not reliably. Speech is the hardest case for active cancellation, and in-ear designs have less passive isolation than over ear cups. Playing a masking sound is what actually works in an office, or using earplugs when you do not need to hear anything at all.

How is the battery life?

Substantially shorter than over ear headphones, which is inherent to the size. Bose's adjustable cancellation lets you reduce or disable it to extend runtime. Plan on returning to the case at least once in a full working day.

Do the tips matter?

Enormously. In-ear cancellation depends on the seal, and using the wrong tip size costs more performance than any processor gains. Try every supplied size properly rather than assuming the middle one is right, which is the most common mistake.

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This review draws on published specifications, manufacturer figures and the consensus of verified owner reviews. We have not tested this product ourselves, and we say so rather than implying otherwise. As an Amazon Associate we earn from qualifying purchases.