
At a glance
| IP Rating | IPX4 |
|---|---|
| Codecs | SBC, AAC, aptX Adaptive |
| ANC | Adaptive ANC (CustomTune) |
| Battery | 6 h |
| Multi-pt | Yes |
- Model QuietComfort Ultra Earbuds (2nd Gen)
- Released 2025
BoseLast updated on November 2026
Bose QuietComfort Ultra Earbuds (2nd Gen) Review
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Overview
The Bose QuietComfort Ultra Earbuds (2nd Gen) are premium noise-cancelling earbuds with CustomTune calibration, Immersive Audio, aptX Adaptive support and a wireless charging case.
- Class-leading noise cancelling
- Secure fit with stability bands
- Wireless charging case
- Immersive Audio for films and music
Key Takeaways
- CustomTune calibrates to each ear
- aptX Adaptive on Snapdragon phones
- Better call mics than the first generation
Best For
- Frequent flyers
- Loud commutes
- Open-plan offices
Avoid If
- You want small buds and a pocket-sized case
- You need certified laptop earbuds
Pros & Cons
The QC Ultra Earbuds (2nd Gen) remain the benchmark for earbud ANC. The fit is secure, sound is rich and the case now charges wirelessly. They are bulky, and laptop calls are only average without a dongle.
PROS
- Class-leading noise cancelling
- Secure fit with stability bands
- Wireless charging case
- Immersive Audio for films and music
CONS
- Large case
- Battery drops with Immersive Audio
- No dongle or UC certification
Review Scores
Score Breakdown
7.9/10 Expert Score
- Voice & Call Noise Isolation7.0/10
- ANC & Transparency9.5/10
- Battery & Case Charging6.9/10
- Fit, Stability & Portability7.5/10
- Connectivity & UC Integration7.0/10
- Sound & Audio Quality9.1/10
How this score is calculated
Each criterion is the weighted average of its available spec scores (0–10) from our Wireless Earbuds scoring matrix. Empty specs are skipped, not scored as 0. The Expert Score is the weighted average of the scored criteria, shown out of 10; stars = Expert Score / 20, rounded to the nearest half star.
| Criterion | Weight | From specs | Score |
|---|---|---|---|
| Voice & Call Noise IsolationWind Noise Reduction: Yes → 10.0; Call Noise Reduction: Voice-focused noise rejection → 4.0 | 24% | 7.0 | 7.0 |
| ANC & TransparencyNoise Cancelling: Adaptive ANC (CustomTune) → 9.5; Adaptive ANC: Yes → 10.0; Transparency Mode: Yes (Aware mode with ActiveSense) → 10.0; Active Noise Cancelling: Yes → 8.0 | 16% | 9.5 | 9.5 |
| Battery & Case ChargingCall Time: 4 → 5.0; Wireless Charging: Yes → 10.0; Fast Charging: Yes → 10.0 | 16% | 6.9 | 6.9 |
| Fit, Stability & PortabilityBud Weight: 7.3 → 6.7; Dust/Water Rating: IPX4 → 8.0; Ear Hooks / Wings: Yes (stability bands) → 10.0; Case Dimensions: 66.0 x 59.7 x 26.9 mm → 6.5 | 12% | 7.5 | 7.5 |
| Connectivity & UC IntegrationUSB Dongle: No → 3.0; Multipoint: Yes → 10.0; Bluetooth Version: 5.3 → 9.5 | 12% | 7.0 | 7.0 |
| Sound & Audio QualityBluetooth Codecs: SBC, AAC, aptX Adaptive → 9.0; Driver Type: Dynamic → 8.0; Custom EQ: Yes (CustomTune and app EQ) → 10.0; Spatial Audio: Yes (Immersive Audio) → 9.0 | 20% | 9.1 | 9.1 |
| Expert Score | 7.9/10 | ||
Bose QC Ultra Earbuds Review
Bose launched the first QuietComfort Ultra Earbuds in 2023, and the second generation followed in 2025 with a wireless charging case, upgraded microphones and improved connection stability. The design and the noise-cancelling focus are unchanged.
Voice & Call Noise Isolation 7.0/10
The second generation brought upgraded microphones and processing for calls, one of the main complaints about the first model. The mics focus on your voice and reduce surrounding noise and wind before the signal reaches the phone.
In ordinary rooms the voice sounds natural, and in busier places the far end hears you well. They still trail business earbuds on laptop calls, mainly because there is no USB adapter.
For frequent laptop meetings, the Poly Voyager Free 60+ with its BT700 dongle is more consistent.
- Wind NR Yes
- Call NR Voice-focused noise rejecti…
ANC & Transparency 9.5/10
Bose’s ActiveSense ANC is among the strongest in any earbud. It removes engine drone and air-conditioning hum, and does better than most rivals with voices and office chatter.
Aware mode lets sound in naturally, and ActiveSense reduces sudden loud noises while staying in Aware. That is useful on city streets.
Compared with the Sony WF-1000XM5, the Bose is slightly better at mid-frequency sounds such as nearby voices and keyboard chatter. Both are excellent on low rumble, so the choice between them comes down to fit and sound.
- ANC Adaptive ANC (CustomTune)
- Adaptive Yes
Battery & Case Charging 6.9/10
Bose quotes about 6 hours of listening per charge, or about 4 hours with Immersive Audio, and the case adds roughly three more charges.
That is enough for most flights and workdays, though Sony and Poly last longer per charge. Immersive Audio is the main battery drain, so switch it off on long trips and save it for films.
The second-generation case charges wirelessly as well as by USB-C, which the first model only offered with an optional cover.
- Call Time 4 h
- Wireless Chg Yes
Fit, Stability & Portability 7.5/10
The buds are larger than most, and they use ear tips plus stability bands in three sizes to hold them in place. Once fitted they feel secure, even when walking quickly.
The larger shape can press on smaller ears over a long flight. Trying every tip and band combination helps, and the bands make them feel more locked in than stem designs, which can loosen when you talk or chew.
The water rating is IPX4, which covers sweat on a run and rain on the way to the station, but not a drop into water.
- Bud Weight 7.3 g
- IP Rating IPX4
- Wings Yes (stability bands)
- Case Size 66.0 x 59.7 x 26.9 mm
Connectivity & UC Integration 7.0/10
Bluetooth 5.3 brings two-device multipoint and Google Fast Pair, and aptX Adaptive kicks in on compatible Snapdragon phones. Switching from a laptop call to a phone call happens without re-pairing.
Bose says the second generation has a more stable connection, especially in crowded places such as stations and airports.
Bose offers no USB adapter and no meeting-platform certification for these buds. They are a travel and listening product first, with calls as a capable extra rather than the main job.
- Dongle No
- Multi-pt Yes
- BT 5.3
Sound & Audio Quality 9.1/10
CustomTune plays a chime when you put the buds in, measures your ear canal and adjusts EQ and ANC to match. Bose’s Immersive Audio adds a spatial mode with Still and Motion settings.
The tuning is warm and full, with strong bass and smooth highs. On Snapdragon Sound phones aptX Adaptive improves quality, while iPhones use AAC.
Immersive Audio works well for films. For music it can feel less precise than stereo, so many listeners use it selectively.
- Codecs SBC, AAC, aptX Adaptive
- Driver Type Dynamic
- EQ Yes (CustomTune and app EQ)
- Spatial Yes (Immersive Audio)
Full Specifications
General
| Best For | Frequent flyers and loud commutes |
|---|---|
| Fit Type | True wireless in-ear |
| Release Year | 2025 |
| Launch Price | $299 |
Design & Build
| Bud Weight | 7.3 g |
|---|---|
| Case Weight | 59.9 g |
| Dust/Water Rating | IPX4 |
| Water Resistance | IPX4 |
| Ear Tip Sizes | Three sizes of tips and stability bands |
| Ear Hooks / Wings | Yes (stability bands) |
| Case Dimensions | 66.0 x 59.7 x 26.9 mm |
| Materials | Plastic (PC-ABS), silicone, metal |
Audio
| Driver Type | Dynamic |
|---|---|
| Bluetooth Codecs | SBC, AAC, aptX Adaptive |
| Spatial Audio | Yes (Immersive Audio) |
| Custom EQ | Yes (CustomTune and app EQ) |
| Head Tracking | Yes (Immersive Audio Motion mode) |
Noise Cancelling
| Noise Cancelling | Adaptive ANC (CustomTune) |
|---|---|
| Active Noise Cancelling | Yes |
| Transparency Mode | Yes (Aware mode with ActiveSense) |
| Adaptive ANC | Yes |
| ANC Levels | Adjustable (Quiet, Aware, Immersion, plus custom modes in the Bose app) |
| Wind Noise Reduction | Yes (SpeechClarity filters wind on calls) |
Microphone
| Microphone Setup | Beamforming microphones in each bud |
|---|---|
| Call Noise Reduction | Voice-focused noise rejection |
Battery & Charging
| Battery (Buds) | 6 h |
|---|---|
| Fast Charging | Yes |
| Wireless Charging | Yes |
| Charging Port | USB-C |
| Case Recharges | 3 |
| Charging Time | 2 h |
| Call Time | 4 h |
Connectivity
| Bluetooth Version | 5.3 |
|---|---|
| Multipoint | Yes |
| Wireless Range | 9 m |
| Google Fast Pair | Yes |
| Bluetooth Profiles | A2DP, HFP |
| USB Dongle | No |
| Single-Bud Use | Yes |
Controls & App
| Controls | Touch |
|---|---|
| Companion App | Bose app |
| Wear Detection | Yes |
| Custom Controls | Yes |
In the Box
| In the Box | Earbuds, wireless charging case, ear tips and stability bands, USB-C cable |
|---|---|
| Warranty | 1-year limited |
Identifiers
| Model Number | QuietComfort Ultra Earbuds (2nd Gen) |
|---|
Compatibility
| OS Compatibility | iOS, Android |
|---|
Product Details
| Brand | Bose |
|---|---|
| Model | QuietComfort Ultra Earbuds (2nd Gen) |
| Model number | QuietComfort Ultra Earbuds (2nd Gen) |
| Release year | 2025 |
Price Comparison
| Store | Price | Deal |
|---|---|---|
| Bose.comOfficial Bose store | Launch price $299 | View deal (opens in a new tab) |
The Verdict
I’d pick the QC Ultra Earbuds (2nd Gen) for flights, trains and open offices where silence matters most. For smaller buds with similar ANC and more detail, the AirPods Pro 3 suit Apple users.
FAQs
What is new in the 2nd Gen model?
A wireless charging case, upgraded call microphones and better connection stability.
How long does the battery last?
About 6 hours, or about 4 hours with Immersive Audio, with roughly three more charges in the case.
Do they support aptX?
Yes. aptX Adaptive works with compatible Snapdragon Sound phones.
What is CustomTune?
A calibration that measures your ear and adjusts sound and ANC each time you put them in.
Are they water resistant?
Yes, IPX4.
Do they support multipoint?
Yes. They connect to two devices at once.
Do they come with a USB dongle?
No. They connect over standard Bluetooth.
What is Immersive Audio?
Bose’s spatial audio mode, with Still and Motion settings.


