Bose QuietComfort Ultra
Score: 72/100
Technics EAHAZ40M2EK
Score: 78/100Rankings
The Technics EAH-AZ40M2 offers audiophile-grade sound with LDAC support, effective dual-hybrid ANC, and seamless multipoint connectivity, all packaged in a lightweight, eco-friendly design. Battery life is modest, especially when using LDAC, and the case lacks a charge indicator.
The Bose QuietComfort Ultra delivers top-tier ANC, immersive head-tracked audio, and high-resolution aptX Adaptive sound, but its battery life and lack of wireless charging limit endurance.
| Attribute | | |
|---|---|---|
5 hours | 5.5 hoursbest | |
— | 10 mbest | |
9.3 mmbest | 6.35 mm | |
| ↓ lower better | 20 g | 5 gbest |
12 monthsbest | 12 monthsbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Audio(2) | ||
Driver Size (mm) | 9.3 mm | 6.35 mm |
Supported Codecs | aptX Adaptive, AAC, SBC | SBC, AAC, LDAC |
Connectivity(1) | ||
Bluetooth Version | 5.3 | 5.2 |
Build & Design(2) | ||
Weight (g) | 20.0 g | 5 g |
Ear Tip Sizes | 9 | XS,S,M,L |
Battery & Power(1) | ||
Battery Life (hours) | 5 hours | 5.5 hours |
Products in the top-left offer the best value (high score, low price).
Professional reviewers praise the QuietComfort Ultra for its unrivaled ANC, comfortable ergonomics, and immersive spatial audio, while noting the lack of wireless charging and modest battery life.
Everyday users overwhelmingly applaud the earbuds' noise cancellation, immersive soundstage and comfort, but complain about the missing wireless charging, bulky case, and short battery life.
“Best noise cancellation I've ever used - blocks out airplane engines completely.”
“The Immersive Audio makes music feel like it's coming from outside my head - it's incredible.”
“I can wear them for hours without discomfort - the fit is perfect.”
Professional reviewers praise the EAH-AZ40M2 for its authentic Technics sound signature, effective dual-hybrid ANC, and industry-leading three-device multipoint connectivity.
Everyday users highlight crystal-clear call quality, easy device switching, and balanced sound, while noting reduced battery life with LDAC and missing auto-pause features.
