Bose QuietComfort Ultra Headphones (2nd Gen) vs Sennheiser HDB 630

Bose QuietComfort Ultra Headphones (2nd Gen)

Noise cancellation remains the QC Ultra's headline strength — adaptive ANC that reviewers repeatedly call best-in-class for travel and the office, measured at an 87% reduction in perceived outside loudness. The new option to switch ANC fully off is the main functional change; transparency (Aware) mode is good but lacks Sony's automatic talk-detection.

• Six months on, the noise cancellation is still without question the best the reviewer has heard on any pair of headphones tested.
• Lab testing measured the QC Ultra 2 reducing the perceived loudness of outside noise by an average of about 87% — a slight improvement on the original's ~85%.
• On a plane, the ANC easily reduces the 80-85 dB cruising hum of a jet engine to barely a background murmur, though there is sometimes a half-to-full-second delay before it fully clamps a sudden 100+ dB takeoff spike.
• Bose stays top of the tree with Sony when it comes to ANC headphones — the second gen keeps that crown.
• Switching ANC fully off is a new capability the first generation never had — and it is what unlocks the headline 45-hour battery figure.
• The big remaining gap versus Sony: with Bose you must press a button to switch into Aware/transparency mode, where Sony detects when you talk and does it automatically — owners call that a dealbreaker.
• Owner experience is nuanced: the ANC is fantastic on consistent noise like trains and buses, but less convincing against sudden, unexpected sounds.

Sennheiser HDB 630

The HDB 630's clearest weakness relative to its $500 rivals. Reviewers agree passive isolation is good, but active cancellation is the weakest of the premium flagships — outclassed by Sony, Bose and Apple, particularly in the mid frequencies where voices and chatter sit.

• SoundGuys says the real improvement over previous Sennheisers is the passive isolation, not the ANC, and that achievable noise attenuation varies significantly with fit.
• In SoundGuys' lab test the HDB 630 reduced outside noise by an average of 83%, versus 87% for the Sony WH-1000XM6.
• RTINGS notes the very lowest rumbles of a bus or plane engine can still creep in and mid-frequency attenuation is weaker than competitors, though most everyday noise is heavily reduced.
• Crinacle calls the ANC the biggest weakness of the 630 — absolutely outclassed by the 'big three' for maximum isolation.

Bose QuietComfort Ultra Headphones (2nd Gen)

Comfort is a near-universal win — a light ~262g build, soft glasses-friendly pads and low clamping force make these one of the easiest flagship ANC headphones to wear all day. The design, dimensions and case are carried over unchanged from Gen 1, with only updated leather-style materials and a slightly more premium feel.

• After two months of daily use these are the best-feeling headphones the reviewer owns — wearable for very long stretches where many headphones get uncomfortable after two hours.
• The headphones weigh in at 262g — lightweight for a pair of premium ANC over-ears, where rivals often sit between 280 and 300g.
• Around 260g with a soft-padded headband, the ear cups fold inward on a proper hinge and drop into a hard-shell carry case with a magnetic clasp.
• The ear cups fold in, making the case significantly more compact than much of the competition — a real win for regular travellers.
• Bose has stepped up the build with aluminium elements and sturdier plastics while keeping the headphones light — a long-standing critique partially addressed.
• This is an iterative refresh: the dimensions, case and controls are identical to Gen 1, with the changes limited to a slightly different leather-style material and what Bose calls an updated design.
• RecordingNOW measured Gen 2 at 262g, around 8g heavier than the Gen 1 it tested — still light, but not a weight reduction.
• Reddit owners back up the comfort: they fit super nicely and are really light, with leather and build quality that feel top-notch and premium.
• The pads do not have the thickest foam, so passive (ANC-off) noise blocking isn't class-leading, and warm weather can mean airing the cups out occasionally.

Sennheiser HDB 630

At ~311g the HDB 630 has plush, beefed-up padding and folds for travel, and most reviewers find it comfortable for long sessions with a lighter clamp than the Momentum 4. The recurring criticism is the mostly-plastic build, which several reviewers say feels under-premium for a $500 headphone, and ear pads that are not the most spacious for larger ears.

• At 311g (up from the Momentum 4's 295g) the extra mass is barely noticeable and comes from significantly beefed-up padding.
• The Headphone Show finds the HDB 630 more comfortable than the Momentum 4 because the clamp force is lighter and the headband distributes pressure more evenly.
• Picky Audio notes the ear pads still aren't the most spacious — ears touch the inside — but says it's easy to get used to and wear either headphone for long periods.
• One comparison reviewer found the HDB 630 needs a short break after about 2 hours of wear, where the lighter 263g Bose QC Ultra can be worn for hours without one.

Bose QuietComfort Ultra Headphones (2nd Gen)

Battery is the clearest spec upgrade over Gen 1: up to 30 hours with ANC on (23 with immersive audio) and a brand-new ANC-off mode reaching 45 hours. Independent testing lands at a real-world 27-28 hours with ANC on. A 15-minute quick charge returns 2-3 hours, a full charge takes ~3 hours, and you can now listen over USB-C while charging.

• Battery is now 30 hours with ANC on, up from 24 on Gen 1 — Bose finally bringing it up to flagship level — with a 15-minute charge giving roughly 3 hours of listening.
• The QC Ultra 2 is rated at 30 hours with ANC on; real-world testing landed consistently between 27 and 28 hours.
• In SoundGuys' standardized battery test the QC Ultra 2 ran for 27 hours 12 minutes — roughly 10 hours short of the Sony WH-1000XM6's 37 hours 14 minutes.
• Bose's own support figures: up to 30 hours with ANC on and immersive audio off, 23 hours with both on, and 45 hours with both off.
• A full 0-100% charge takes about 3 hours, and a low-battery 15-minute top-up powers the headphones for up to 3 hours.
• For the first time you can use the Bose while it is charging via USB-C — a 15-minute fast charge returns around 2.5 hours of playback.
• A new auto power-save mode kicks in when the headphones are laid flat, and they sleep after 20 minutes off your head — small touches that stretch real-world endurance.
• Even with the bump to 30 hours, the QC Ultra 2 still charges slower than rivals — Sony's WH-1000XM6 returns 3 hours of playback from just a 3-minute charge versus Bose's 15.

Sennheiser HDB 630

An unambiguous strong point. Sennheiser rates the HDB 630 at up to 60 hours with ANC on, and independent battery tests confirm it lands in the 53-54 hour range — roughly double the Sony WH-1000XM6 and triple the AirPods Max. A 10-minute quick charge returns ~7 hours and a full charge takes only 1.5-2 hours.

• Sennheiser rates the HDB 630 at up to 60 hours of playback per charge, with a 10-minute charge providing hours of playback in a pinch.
• In SoundGuys' standardised battery test the HDB 630 lasted 53 hours 46 minutes with ANC on.
• RTINGS measured just over 54 hours with ANC on against Sennheiser's 60-hour claim, and confirmed a ~1.5 hour full charge.
• Picky Audio gave battery a 10/10 — 60 hours advertised with ANC on, 10 minutes for 7 hours of playback, and a 2-hour full charge from dead.
• Battery life drops to about 45 hours when using the BTD 700 dongle in its highest-quality mode — still far ahead of rivals.

Bose QuietComfort Ultra Headphones (2nd Gen)

Call quality is solid for everyday use but not class-leading. Bose improved the call experience over Gen 1, yet independent mic testing shows the headphones let in more background noise than some rivals in loud, dynamic environments — and reviewers expect a future firmware update to add Bose's newer speech-clarity feature.

• In dynamic loud-noise mic testing, the QC Ultra 2 let in among the most background noise of the group, but still delivered relatively clean speech.
• Reviewers expect Bose to ship a firmware update adding its newer speech-clarity voice-enhancement feature, which is needed to lift call quality in windy and loud environments.
• Against the AirPods Max 2's new studio-grade microphones the Bose trails, but it still gets the job done for the most part on calls.
• Calls hand off smoothly: a phone call will seamlessly switch to the headphones even on a non-Apple device like a Pixel.
• Some owners feel a premium flagship from Bose should have shipped with better microphone call quality — it remains a relative weak point.

Sennheiser HDB 630

A weak spot. Reviewers say call and microphone quality is mediocre and that the mic hardware is optimized only to about 10kHz, so even the BTD 700 dongle's wideband voice codec brings little real-world improvement. Fine for casual calls, not for serious conferencing or recording.

• jakkuh's verdict: the HDB 630 is excellent unless you need to record audio with the mics — in which case just buy a dedicated microphone.
• Weekend Gear Guide explains the mic frequency response is optimized for 50Hz-10kHz, so the BTD 700 dongle's super-wideband voice codec can't deliver its full benefit.
• In a three-way call test against Bose and Sony, the HDB 630 scored equal overall — solid but not a standout for voice pickup.
• The Headphone Show says the mics aren't perfect — you'd still want a standalone microphone — but the progress is visible.
• GadgetryTech reports USB-microphone issues across platforms — including on PlayStation — that they hope a firmware update will address.

Bose QuietComfort Ultra Headphones (2nd Gen)

The QC Ultra 2 keeps full physical button controls plus a touch strip, multipoint pairing and aptX Adaptive high-res support, and adds USB-C lossless wired audio and a movie-optimized Cinema mode. The Bose companion app, however, is widely seen as behind Sony's, and a controversial OTA update changed or removed functionality for early owners.

• Gen 2 adds USB-C wired audio supporting 24-bit/48kHz lossless playback while charging — its biggest single upgrade — alongside the ability to turn off ANC and a new movie-optimized Cinema mode.
• Full physical button controls — better than touch for glove-wearers in winter — sit alongside a touch strip on the right cup for volume and a configurable shortcut.
• All of Bose's DSP features — EQ, ANC and sound profiles — keep working in wired mode, so going USB-C doesn't strip out the headphone's processing.
• Multipoint keeps two devices connected, and switching a third in is as easy as picking the Bose in that device's Bluetooth settings to pull the connection over.
• The headphones still ride on aptX Adaptive for high-res — DHRME notes Bose hasn't moved off the aptX suite, and there's no LDAC.
• A controversial over-the-air firmware update removed some functionality and changed other behaviour, leaving some early owners unhappy.
• The Bose app is consistently called a weak point — Reddit owners say it has always been a disappointment, and that Bose focuses on acoustics while Sony's software clearly exceeds it.
• One owner reports audio cutouts when connected to multiple devices at once despite multipoint being an advertised feature — a connectivity reliability concern.

Sennheiser HDB 630

The Smart Control Plus app is a genuine highlight — its 5-band professional parametric EQ is widely called the best in any wireless headphone. Bluetooth 5.2 with aptX Adaptive, four ways to connect, and a 30ms low-latency gaming mode are all positives, though touch controls are the slowest of the premium pack and early units had multipoint bugs.

• The Smart Control Plus app offers a professional 5-band parametric EQ — you can adjust each band's frequency and Q factor, add high/low shelves, and use undo/redo; Picky Audio calls it the best EQ available right now.
• GadgetryTech calls the parametric EQ massive — Sennheiser already makes good-sounding products, and giving listeners the keys to custom-tune is a huge advantage.
• The app handles EQ, ANC modes, firmware updates and a find-my-headphones location feature; pairing is straightforward.
• There are four ways to connect — Bluetooth 5.2, USB-C wired, 3.5mm analog, and the BTD 700 dongle — covering essentially any source.
• The BTD 700 dongle has a low-latency gaming mode that drops latency to a claimed ~30ms — good enough for lag-free video and competitive gaming.

Bose QuietComfort Ultra Headphones (2nd Gen)

At an unchanged $449 the QC Ultra 2 sits head-to-head with the Sony WH-1000XM6 and AirPods Max. It wins on ANC and comfort and undercuts the AirPods Max, but trails Sony on battery and software — and with the near-identical Gen 1 now heavily discounted, the value case depends heavily on how much you weigh the new battery, USB-C audio and refined sound.

• Forbes tested more than 25 pairs and named the Bose QuietComfort Ultra Headphones (2nd Gen) the best wireless headphones overall.
• Gen 2 launches at $449 in both the US and UK — exactly the same as Gen 1's launch price, a small step up from the older $429 QC Ultra.
• Against the AirPods Max 2 the Bose gives 30 hours of battery to Apple's 20, weighs about 120g less and costs $100 less — the more practical daily driver.
• Versus the Sony WH-1000XM6 it's a genuinely close call — Bose wins comfort and ties on ANC, but Sony pulls ahead on battery life and the depth of its app and automation.
• Because Gen 1 is roughly 90% the same headphone and now sees steep discounts (as low as $299 on Black Friday), a discounted original can be the smarter buy for value hunters.
• A reviewer writing an ANC buying guide rated a rival as the headphone to get — yet still found the QC Ultra more impressive in certain ways, making it a difficult choice at this price.
• For travel and desk work the QC Ultra 2 is reviewers' clear pick — the comfort, ANC and battery make them the headphones owners reach for all the time.

Sennheiser HDB 630

At a $489-500 launch price the HDB 630 sits exactly alongside the Sony WH-1000XM6, Bose QC Ultra and AirPods Max. Reviewers frame it as the pick for buyers who prioritise sound, battery and wired flexibility — and the wrong pick for buyers who want the best ANC or a luxe build.

• SoundGuys: while it doesn't take the crown for best ANC ever tested, the HDB 630 sounds far better than the Sony WH-1000XM6, the Bose QC Ultra and the AirPods Max.
• The HDB 630 launched at $489-500, the same bracket as the Sony XM6, AirPods Max and B&W PX7 range.
• The Headphone Show recommended the HDB 630 as the ANC headphone to get in its buying guide — though it concedes the Bose QC Ultra is more impressive in certain ways, making it a genuinely difficult choice.
• Crinacle loves the 630 as an audiophile but cautions that the average buyer who prioritises ANC should still consider the big three.