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Bose QuietComfort Ultra Earbuds (2nd Gen)

Music, Travel, Commuting, Office Work, Phone Calls, Noise Cancellation, Spatial Audio

Overview

The Bose QuietComfort Ultra Earbuds (2nd Gen), announced June 12, 2025 and available from early September 2025 at $299, are Bose's flagship true wireless earbuds. They build on the acclaimed 2023 original with improved adaptive noise cancellation, AI-powered SpeechClarity call quality, and a charging case with built-in Qi wireless charging. With world-class ANC, CustomTune personalized sound, Bose Immersive Audio spatial audio, and 8 microphones for calls, they remain the benchmark for noise-cancelling earbuds.

Key Highlights

  • World-class noise cancellation — SoundGuys measured 85% external noise reduction, among the best of any earbuds tested; CustomTune technology plays a calibration tone on every power-on to tailor ANC and audio to your unique ear canal shape
  • SpeechClarity AI call technology uses 8 microphones (4 per bud) with bone-conduction voice pickups, dynamic mixing, and adaptive filters to suppress wind and background noise; hearing-aid-derived audio augmentation keeps your voice clear
  • 6 hours of playback with ANC on (up to 24h total with the case), 2-hour full charge, and built-in Qi wireless charging — a feature that required a separate accessory cover on the 2023 original; case battery level reporting in the Bose app
  • Bose Immersive Audio spatial sound with new Cinema Mode that spatializes video content into theater-like audio; touch controls with swipe volume, plus the option to disable touch controls in the app
  • IPX4 water resistance, 9 fit combinations (3 eartip sizes x 3 stability band sizes) with earwax guards on the nozzles, Bluetooth 5.3 multipoint, and Snapdragon Sound with aptX Lossless for compatible Android phones

Video

Technical Specifications

Brand Bose
Model Bose QuietComfort Ultra Earbuds (2nd Gen)
Driver Custom-designed dynamic drivers with CustomTune per-ear audio calibration (official driver size not published)
Codec SBC, AAC, aptX Adaptive (aptX Lossless via Snapdragon Sound)
Noise Cancelling Yes — World-class adaptive noise cancellation with Quiet Mode (full ANC), Aware Mode (transparency) with refined ActiveSense adaptive technology, and Immersion Mode (ANC + Bose Immersive Audio spatial sound); CustomTune calibrates ANC and audio to the shape of your ear canal
Battery 6h (ANC on) / 4h (Immersive Audio) earbuds, ~4h talk time; 24h total with case (case holds 3 full charges); 2h full charge via USB-C or Qi wireless charging
Connectivity Bluetooth 5.3, Multipoint (2 devices), Snapdragon Sound, Google Fast Pair, Microsoft Swift Pair, Bose app support
Dimensions Earbud: 1.18" H x 0.49" W x 0.98" D (30 x 12.5 x 24.9 mm), 7.3g (0.016 lb) each; Charging Case: 2.60" H x 2.35" W x 1.06" D (66 x 59.7 x 26.9 mm), 60g (0.132 lb)
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Troubleshooting

Fix Guides for the Bose QuietComfort Ultra Earbuds (2nd Gen)

Step-by-step fixes for common issues with this gadget

🔧 Fix Guide

How to Fix Bose QuietComfort Ultra Earbuds Not Charging

14 Sep 2026

Most common cause: a stability band not lined up so the earbud never seats onto the charging pins in the case. Also check for a stuck left charging pin and dirty contacts before assuming the battery is dead.