Bose QuietComfort Ultra Earbuds review
Previous-generation position and fit system
The original QuietComfort Ultra Earbuds are now previous generation. Bose introduced QuietComfort Ultra Earbuds (2nd Gen) in 2025 with updated call processing, wireless charging included in the standard case and other refinements, so the first-generation model should be treated as discounted older hardware rather than Bose's current premium reference. Retail names are easily shortened to QuietComfort Ultra Earbuds, making the generation, model number, case type and included accessories important checks before payment.
Bose separates the ear tip from the stability band, allowing buyers to combine sizes rather than forcing one moulded fitting. This can create a secure seal without pushing the tip excessively deep, and the stability band is valuable for walking and exercise. Fit remains individual: the outer housing is substantial, pressure can build during long sessions and the wrong band can prevent the bud sitting correctly. The seal is central to bass and ANC performance, so a comfortable loose fit may sound and cancel noise differently from a tighter one.
Noise cancellation, sound and codecs
Active noise cancellation is the original Ultra's defining strength. Bose's CustomTune process measures the ear each time the buds are inserted and adapts sound and cancellation. Low-frequency transport rumble and steady environmental noise can be reduced very effectively, but voices, wind and abrupt sounds are not erased. Aware mode with ActiveSense can soften sudden noise while allowing more surroundings through, yet it is not a substitute for removing an earbud near traffic, railway platforms or other situations where missing a sound could be dangerous.
Sound is full, energetic and adjustable through the Bose app, though the available equalisation is less granular than Sony's or Nothing's advanced controls. Bose Immersive Audio creates a spatial presentation in still or motion modes, but it uses additional battery and is not automatically more accurate for music. The buds support common SBC and AAC connections, with aptX Adaptive or Snapdragon Sound benefits limited to compatible devices and configurations. Codec labels do not override fit, mastering, radio conditions or the source app, and Apple devices do not provide the same Qualcomm path as supported Android phones.
Battery, calls and connection behaviour
Bose rates the earbuds for around six hours of ordinary listening, falling to roughly four hours with Immersive Audio active, with additional charges available from the case. Real use varies with ANC, volume, calls, firmware, temperature and battery age. The first-generation standard case did not universally include built-in Qi charging; Bose sold a separate wireless-charging case cover in some markets and bundles. Buyers should therefore inspect the exact case rather than assuming every Ultra listing charges wirelessly. USB-C remains the reliable charging method.
Multipoint support and connection behaviour evolved through firmware, so current software should be installed before judging switching performance. Even then, multipoint, immersive features, codec selection and app behaviour can interact differently across phones and computers. The microphones are adequate for calls in calm surroundings, but the original generation is not class-leading in wind or crowded streets. A premium ANC system can help the wearer hear a caller, while the person at the other end still receives heavily processed or interrupted speech.
Durability, safe listening and verdict
The earbuds are rated IPX4 for sweat and splashes, not immersion. The case and charging contacts should be kept dry, and the earbuds should never be returned wet to a closed case. Tips and stability bands are removable consumables and should be cleaned gently and allowed to dry completely. Replacement availability matters because worn silicone affects seal and hygiene. Earbuds should not be shared casually, and persistent irritation, pain or discharge is a reason to stop using them and seek medical guidance.
The original Ultra remains a compelling discounted choice for buyers who prioritise maximum noise reduction and whose ears suit Bose's band-and-tip system. It is less attractive near second-generation pricing, for users seeking detailed EQ, or for anyone assuming wireless charging is included. Powerful ANC can encourage longer, louder sessions, so use the lowest comfortable volume and take breaks. Ringing, muffled hearing or pain after listening are warning signs; persistent symptoms warrant professional assessment. MainBuyer has not performed hands-on sound, ANC, call, battery or durability testing. This review synthesises official information and independent coverage, and buyers should verify the generation, case, regional warranty and accessory bundle before ordering.