The Bose QuietComfort Ultra 2 wins because it nails the two things that matter most in a noise-cancelling headphone: silencing the world and staying comfortable while doing it. SoundGuys measured its ANC at 87% noise attenuation in standardized lab tests, the highest of any headphone they tested. RecordingNOW gave it a perfect 5/5 for comfort, noting the ear cups are deep enough that your ears never touch the interior. Jasper Tech, who built a custom clamping-force rig called "Clampy," confirmed the Bose applies less pressure than any competitor while still maintaining a solid seal.
The sound holds up, too. RecordingNOW praised its sound for having richer mids and better instrument separation than the Sony XM6, calling it genuinely high-fidelity. This is Tech Today ranked it their overall number one pick, and Picky Audio gave it top marks across ANC, comfort, and sound combined.
The real clincher is that Bose improved significantly with this second generation. The original QC Ultra had a reputation for middling sound, the Gen 2 fixed that while keeping everything else best-in-class. No other headphone combines top-tier ANC, top-tier comfort, and sound this good.
What It Won't Do
The Bose has an audible white noise hiss whenever ANC is engaged. In a quiet room with no music playing, both Jasper Tech and GadgetryTech confirmed you can hear a faint static. Bose doesn't let you fully disable the ANC processing, so there's no workaround. It's a non-issue in noisy environments (which is where you'd use ANC), but audiophiles who listen in dead-silent rooms will notice it. The touch-sensitive volume strip is also frustratingly easy to accidentally trigger. SoundGuys warned it can "blow your eardrums out" with an accidental swipe.
The Sennheiser Momentum 4 Wireless makes the math hard to argue with. At its current street price of around $200-$230, you're getting a headphone that SoundGuys measured at 55 hours of battery life with ANC on, that's double what the $450 Bose and $400 Sony deliver. CEONTHEMAKING called it the "safest pick" for pure sound quality under $500, and Picky Audio declared it the best-sounding mid-range headphone without needing any EQ adjustment out of the box.
The Momentum 4 also does something no other headphone in its price range offers: true lossless audio via USB-C wired connection. SoundGuys highlighted this as a major differentiator for audio purists who want bit-perfect playback from their laptop or phone. You're getting a feature that some $800 headphones don't even include.
GadgetryTech explicitly named the Momentum 4 the best bang-for-your-buck wireless headphone available, period. 60-hour battery, flagship-grade sound, and lossless wired audio for under $230. At that price, you buy it before you talk yourself out of it.
What It Won't Do
The Sennheiser's ANC is firmly mid-tier. DHRME rated it "Tier B," and SoundGuys confirmed it falls short of 80% noise attenuation, meaning subway rumble and bus engines will get through. If you're a frequent flyer or heavy commuter, this is a real limitation. The comfort story is also mixed: both DHRME and Picky Audio reported that the tight clamping force and shallow ear cups caused physical pain behind their ears during sessions longer than two hours.
Who Should Buy Which
Bose QuietComfort Ultra Headphones (2nd Gen)
Unmatched comfort and ANC that silences everything
- Frequent flyers and commuters who need elite noise cancellation
- All-day wearers and glasses-wearers who prioritize supreme comfort
- Bass lovers and movie watchers who'll enjoy Cinema Mode spatial audio
- Listeners who prefer a simple app experience over deep EQ tinkering
- Android users who want aptX Adaptive/Lossless codec support
Sennheiser Momentum 4 Wireless
60-hour battery and audiophile sound at half the price
- Value-conscious buyers who want flagship sound at half the price
- Home and office users who need 60-hour battery for weekly charging
- Audio purists who want USB-C lossless wired playback
- Listeners across all music genres, natural tuning works out of the box
- Anyone who'd rather invest the $200 savings into better music or a DAC