Compare Bose QuietComfort Ultra Bluetooth Headphones (2nd Gen) vs DALI IO-12 Headphones

Noise cancelation is consistently described as top-tier and often best-in-class, with Gen 2 seen as a small refinement (more precise, fewer quirks); some outlets still give Sony a slight edge in ultimate silence. Most reviews highlight easy ANC control through modes or a slider (often 1–10) and note Gen 2 can fully disable ANC, which improves flexibility and battery options.

ANC is broadly described as effective for reducing low rumbles and general ambient noise, but it is not considered class-leading compared with flagship Bose, Sony, or Apple models; some mention susceptibility to wind noise. Noise cancellation adjustability is limited to onboard mode switching in most coverage, with some sources noting multiple ANC modes, but no fine tuning via app.

Android support is repeatedly described as strong, with easy pairing and the best codec features (aptX family) available on compatible Snapdragon phones.

The companion app is generally stable and straightforward for modes, ANC, immersive audio, and device management, but many reviewers describe it as basic compared with feature-rich competitors.

Multiple sources confirm there is no companion app for the IO-12.

Reviews that discuss codecs call out aptX Adaptive and related options (including lossless/low-latency variants on compatible Snapdragon devices) as a meaningful plus for Android users.

Multiple reviews explicitly cite aptX options, including higher-tier variants such as aptX HD and aptX Adaptive, as part of the IO-12 wireless feature set.

USB-C wired audio is noted to reduce Bluetooth latency by tens of milliseconds, which can improve lip-sync for video compared with wireless use.

Bass is widely praised as deeper, punchier, and more controlled than the prior model, though a couple reviewers still describe it as warm or occasionally one-note depending on genre and settings.

Bass is typically described as tight and controlled in Hi-Fi mode with convincing weight, while Bass mode adds slam and warmth without turning into a boomy mess, though it can trade away some treble presence.

Battery life is commonly reported around 27–30 hours with ANC on, which is competitive but not class-leading; immersive/spatial modes reduce runtime, and some sources note longer life with ANC off.

Battery life is commonly cited around 35 hours, with at least one real-world report closer to 30 hours; overall it is respectable but not exceptional relative to cheaper competitors.

Bluetooth performance is often described as quick to connect and stable in daily use, but a minority report occasional connection quirks or issues.

Bluetooth connectivity is commonly reported as stable, with fast pairing and few to no dropouts even in busy environments.

Build quality is generally seen as durable enough for daily travel, but the heavy use of plastic and occasional rattly feel reduce the perceived premium value at this price.

Build quality is repeatedly described as ultra-premium, with strong materials and a luxury feel that holds up to travel use when handled with care.

Physical buttons are serviceable but frequently criticized for doing too many functions (pairing/power, multi-press combos) and offering limited customization.

Buttons are often praised for responsiveness and tactile feedback, but a few reviewers mention accidental activation, especially when adjusting volume or leaning against a seat while traveling.

Several reviewers mention the 2.5mm analog input as less common than 3.5mm, but the included cable and USB-C option make it easy to stay connected when needed.

Cable quality feedback is mixed: some appreciate the included cables and finish, while at least one reviewer calls the cable frustrating to use and prefers the shorter option.

The included case is widely appreciated for being sturdy and compact, though some reviewers find the folding orientation awkward or wish the case design were quicker to open/close.

The carry case is typically praised as premium and protective, with good structure and compartments, but it adds bulk and can be impractical for compact packing.

Charging is typically described as convenient, with quick-charge figures around 15 minutes for a few hours of playback and full charge around a few hours; USB-C also enables charging while listening.

Charging is described as taking roughly 1.5 to 2 hours from flat with no fast-charge boost mentioned, and one reviewer notes behavior consistent with limiting charge to protect long-term battery health.

Clamping force is usually described as gentle and fatigue-free, but a few reviewers find the fit on the snug side (great for seal) or potentially too loose for smaller heads during movement.

Clamping force is usually described as secure but comfortable, ranging from light to moderately firm depending on the reviewer, without feeling unstable.

Codec support is described as modern and well-rounded for 2025-era ANC headphones, with standard codecs plus aptX Adaptive family and multiple wired options; performance depends on your source device support.

Codec support is positioned as strong for a premium wireless headphone, with repeated mentions of AAC and aptX-family options that help preserve detail over Bluetooth.

Comfort is a core strength: many reviewers call it class-leading for long sessions thanks to light weight, plush pads, and an easy seal, with only occasional notes about heat buildup or fit preferences.

Long-session comfort is one of the most consistently praised aspects, with roomy earcups and plush pads that avoid pressure points for many listeners.

Design is largely unchanged from the previous generation, with updated glossy accents and more color options; reactions range from stylishly understated to a bit boring or too fingerprint-prone.

Design is widely described as premium and distinctive, but the dark chocolate color can divide opinion, and the large earcups create a bold, bulky look on some heads.

At least one reviewer notes there is no dedicated low-latency wireless dongle, limiting plug-and-play latency solutions for gaming compared with some rivals.

Earpads are typically described as soft, deep, and comfortable, though some users note ears can touch the inner padding or that the surface may not feel ultra-premium to the touch.

Earcup and pad materials are frequently described as plush, premium leather with generous space for larger ears, contributing to both comfort and isolation.

The yoke/rotation design allows the cups to lay flat, but at least one review notes the rotation range is limited in one direction.

Earcups are commonly described as able to swivel or lay flat, aiding seal and travel storage even though the overall design does not fold compactly.

EQ control is repeatedly called out as limited (a simple 3-band slider), good for small tweaks but not ideal for listeners who want granular tuning.

Without an app, EQ customization is not available beyond onboard preset modes, which limits personalization compared with mainstream flagship wireless headphones.

Tonality can be shaped into a more balanced response with CustomTune and light EQ, but out of the box many characterize it as a V-shaped or slightly dark consumer tuning rather than strictly neutral.

Hi-Fi mode is commonly described as balanced and relatively uncolored, while Bass mode shifts the tonality warmer and can slightly reduce upper-mid and treble prominence.

Headband adjustment is described as smooth and secure, holding its position well once set.

Where mentioned, the metal headband/hinge structure is viewed as reassuring, even though much of the exterior uses plastic to save weight.

Accessories are typically described as solid for the category, with a sturdy case plus USB-C and analog cables included for flexible connections.

Included accessories are generally considered generous, with multiple cables and adapters plus a premium case, though some note the absence of a USB-C to USB-C cable.

Instrument separation is rated good-to-excellent, with most reviewers finding layering and placement strong; a few note busy mixes can still blur slightly.

Instrument separation and imaging are consistently praised, with precise placement and clear spacing between layers even in complex mixes.

Reviews that discuss loud listening report strong composure and minimal distortion at higher volumes, encouraging careful use because it stays clean as you turn it up.

Noise reduction on calls is usually effective, keeping background sounds lower while preserving speech, though some tests still let intermittent noise bleed through or add a slightly processed character.

Call quality is generally good for a premium ANC headphone, with most reviewers saying voices stay intelligible in noisy places; a few describe it as merely fine, compressed, or not exceptional.

Midrange is generally clear with solid vocal presence, but some reviews note slightly recessed or less biting mids (especially for guitars/rock) compared with top competitors.

Midrange clarity is repeatedly highlighted as a standout strength, with clean layering and realistic vocal and instrument textures that feel unusually hi-fi for Bluetooth.

Cross-platform use is a common strength, with reviewers noting smooth switching between phones and computers across iOS and Android ecosystems.

Multipoint is widely praised as seamless for two devices with smooth switching; a couple edge cases (e.g., juggling TV/phone or certain setups) can be finicky.

Multipoint is noted as supported and convenient for staying connected to two devices, though it is not heavily stress-tested across all sources.

Passive isolation benefits from a good seal and deep cups, but a few reviewers note the foam is not the thickest; overall, it helps the ANC work even better on commutes.

Passive noise isolation is described as strong thanks to large, well-sealing earcups and design details aimed at closing gaps around the ear, providing a solid foundation before ANC is even enabled.

Portability is strong for a flagship ANC headphone: the frame folds and articulates well, keeping the carry footprint compact for travel.

Portability is a recurring compromise: the headphones are large, do not fold down compactly, and several reviewers mention the case is too big for many backpacks.

Preset EQ or mode profiles exist and can help (e.g., bass-reducing or treble-boosting options), but many reviewers find the presets and overall EQ ecosystem underwhelming.

Preset sound modes are generally seen as well-judged: Hi-Fi is the reference setting for balance and clarity, while Bass mode adds punch and warmth, sometimes with a tradeoff in treble and mid presence.

Replaceable earpads are highlighted as a practical perk for long-term ownership, cleaning, and swapping for third-party pad options.

Replaceable earpads are explicitly mentioned as a welcome premium touch, with pads that can be removed for cleaning or replacement.

Sensors and automation (on-head detection, auto pause, low-power modes) are often praised for making the headphones feel effortless day to day.

Some coverage notes the absence of wear sensors and similar smart conveniences found on mainstream flagships, reinforcing the IO-12 focus on audio and simplicity over automation.

Glossy accents look more premium to some, but multiple reviewers mention they pick up fingerprints and dust more easily than matte finishes.

Setup is generally described as simple, with fast pairing and reliable auto-connect behaviors that reduce daily friction.

Day-to-day operation is described as straightforward because settings are handled on the headphones, but the lack of an app also means limited customization and some sources note manual firmware updating.

Across reviews, the sound is described as enjoyable and travel-friendly, with a consumer-leaning tuning and strong bass; several reviewers say it improves on Gen 1, but a few still find it only fine or a bit dark versus audiophile-leaning rivals. Wired playback (especially over USB-C) is frequently described as clearer or more detailed than Bluetooth, with the bonus of charging-while-listening; analog wired is also supported for older sources.

Across reviews, sound quality is the headline: a speaker-like, highly resolving presentation that many call among the best in wireless closed-backs, with strong imaging and refinement. Wired sound is often described as equal or better in resolution than wireless, with USB-C and 3.5 mm options; passive use is supported, and some recommend listening powered on to benefit from onboard DSP.

Soundstage is repeatedly called wide and open for a closed-back ANC headphone, helping music and movies feel less claustrophobic.

Most reviews describe an unusually open, spacious soundstage for a closed-back wireless headphone, with strong width and credible depth; one reviewer notes it is not stadium-wide but avoids feeling claustrophobic.

Immersive/spatial features (including cinema mode) get mixed reactions: some love cinema for clearer dialogue and a bigger movie feel, while others dislike the processing and prefer stereo for music.

Fit stability is good for desk work, commuting, and light movement, but several reviewers caution it is not ideal for more dynamic workouts due to the lack of an IP rating and comfort-first clamping.

Fit stability is generally described as secure with a good seal, but the sizing and overall footprint may feel better suited to average-to-larger heads than very small ones.

The touch volume control is divisive: some find it responsive and sleek, while others call it imprecise or too easy to trigger large volume changes, especially without tactile feedback.

Control surfaces are generally responsive; some coverage mentions touch-style control areas, but overall interaction is described as clicky and deliberate rather than finicky.

Transparency mode is commonly rated among the best and natural-sounding, though several reviewers mention a faint hiss/white noise or slightly reduced openness versus the very best implementations.

Transparency mode is generally described as clear and practical for awareness, without strong criticism, though fewer reviews go deep on its nuance.

Treble is typically smooth and cleaner than Gen 1, avoiding harshness; however, multiple reviewers wish for more sparkle or micro-detail and often add treble via EQ.

Treble is generally airy, detailed, and smooth, with occasional notes that it can approach brightness on certain recordings; Bass mode can tame the top end if needed.

USB-C is a key Gen 2 upgrade, enabling digital audio input (often described as lossless/hi-res) in addition to charging, and allowing simultaneous charge-and-listen use cases.

USB-C is highlighted as both a charging and playback option, with multiple sources noting USB audio support up to 24-bit and 96kHz.

Voice assistant access is supported via shortcuts or touch-and-hold actions in the app, making it easy to trigger assistants without pulling out your phone.

Voice assistant support is described as available via a press or long-press action, and some sources also mention voice prompts for battery status.

Volume output is generally ample, and at least one reviewer reports slightly higher output when using USB-C wired audio.

Volume output is commonly described as having plenty of headroom, with enough drive to get loud without feeling strained.

Multiple reviews emphasize there is no official water or sweat rating, making these a poor choice for rain, heavy workouts, or sweaty gym sessions.

Weight is repeatedly highlighted as a major comfort advantage versus heavier rivals, making it easier to wear for travel and workdays.

Weight is noted as present but generally not burdensome once worn, though some acknowledge the overall heft and size compared to mainstream travel headphones.