Compare Bose QuietComfort Ultra Earbuds (2nd Gen) vs Sennheiser CX 80U Wired Earbuds

Noise cancelling is repeatedly described as class-leading, with especially strong suppression of engine rumble and broad-spectrum everyday noise; a few reviews note minor hiss or occasional artifacts with sudden loud impacts, but overall performance remains top tier. Adjustability is strong via app modes and sliders, including custom levels and adaptive behavior (such as smoothing spikes), though some mode limitations and UI quirks are mentioned.

The earbuds do not offer ANC; one review frames the isolation as passive instead of active noise cancellation.

Android support is repeatedly framed as a strong use case, with modern Bluetooth features and higher-quality codec options that cater well to Android ecosystems.

Android compatibility is directly supported by successful use with a Google Pixel phone.

The Bose app is generally seen as essential and functional for modes, device management, and settings, though some workflows (like mode creation) can feel limited or slightly confusing.

One review says there is no companion app, making app-based customization essentially absent.

aptX Adaptive (including higher-quality variants cited by reviewers) is a key advantage versus some rivals for Android listeners who want better Bluetooth audio performance when supported by their phone.

Audio/video sync is usually fine for casual viewing and even editing for some users, but multiple comments suggest latency is not ideal for competitive gaming or fast-reaction play.

One review supports low-latency playback, though it does not provide detailed video-sync testing.

Bass is consistently described as deep, punchy, and satisfying; some listeners consider it aggressive or dominant, especially out of the box.

Bass is generally clean and punchy, but one review specifically notes weaker sub-bass and very low-frequency weight.

Battery life is consistently called average for the category: typically around 6 hours with ANC, dropping with immersive/spatial modes, and supported by multiple case recharges.

Bluetooth stability is generally reported as solid across iOS and Android devices, with few or no dropouts in typical use, though some reviewers mention earlier-gen complaints and suggest toggling certain features if problems appear.

The product is reviewed as a wired USB-C alternative to Bluetooth earbuds rather than a Bluetooth model.

Earbud build quality is generally considered premium, with durability expectations aligned to the price; the case gets more mixed feedback on feel and refinement.

One review directly praises the build quality as impressive for a budget wired earbud.

One review highlights a built-in DAC with lossless and high-resolution playback support.

Controls are easy to learn and include useful gestures (notably swipe volume), yet multiple reviews mention finickiness and accidental activations; the ability to disable touch controls is an important mitigation.

Control opinions are mixed: one review dislikes the lack of volume buttons, while another finds the button response easy and tactile.

Cable usability is a drawback in one review because the wires lack a flat anti-tangle design.

The case is frequently described as bulky and less premium-feeling than the earbuds themselves; some reviewers also note the buds can be awkward to retrieve.

Charging is a Gen 2 strong point thanks to wireless charging support, plus fast top-ups via the case; a few notes suggest wireless coil placement can be finicky on some pads.

Codec support is a highlight for many reviewers, especially for Android users, with modern high-quality options noted alongside broad device compatibility.

Comfort is widely praised for long sessions, especially once tips and stability bands are dialed in; a consistent caveat is that the shell size may not suit the smallest ears.

Both reviews give comfort very high marks, including multi-hour sessions and long-period wear.

Design is polarizing: many like the sleek, modern look, but the buds are visually and physically large, which can be a problem for smaller ears.

The design is seen as classy and low-key rather than flashy, with positive notes on rounded buds and inconspicuous styling.

Both reviews connect the eartips to a strong in-ear seal and secure fit.

Tip and wing options are helpful for achieving a strong seal, but multiple reviews note the included range is adequate rather than expansive given the premium price.

Both reviews mention multiple eartip sizes, giving users fit options.

EQ customization is a frequent criticism: it is typically described as a basic 3-band tool with limited precision, which may frustrate listeners trying to meaningfully reshape the tuning.

Equalizer customization is essentially absent because the review notes no companion app for adjusting the sound profile.

One review describes a full-range presentation with bass, mids, and treble all represented clearly.

Accessories commonly include multiple tip sizes and stability bands plus a charging cable; a few reviewers wish for extras like more sizes or a longer cable.

Included eartips are useful, with both reviews pointing to extra sizes or noise-sealing tips.

Instrument separation is repeatedly rated as strong, helping busy tracks stay organized and making details easier to pick out.

Both reviews describe good separation, with layers or vocals staying distinct rather than muddy or blended.

The earbuds include an in-line microphone, but its performance is limited by static and call-quality caveats.

One review credits the USB-C DAC with lossless and 24-bit/96KHz playback support.

At higher volumes, clarity generally holds up well according to multiple impressions, though overall tonal preference still depends on how you feel about the bass-forward tuning.

One review reports that treble remained controlled even at peak volume, supporting strong maximum-volume clarity.

Noise reduction for calls is frequently praised (including AI-style voice isolation), yet a minority of measurements-based reviews report that wind and background sound can still bleed through depending on scenario.

Microphone noise handling is a weakness because one review heard background static throughout a voice recording.

Call quality is widely reported as improved versus earlier generations, often sounding clear and intelligible; however, some tests still find it can struggle in very windy or extremely noisy environments.

The mic is usable but limited, with one review saying it does not deliver top-tier call quality.

Midrange presentation is generally clear enough for vocals and instruments, but opinions vary: some hear warmth and natural tone while others cite recessed or uneven mids that can affect certain voices.

Mids and vocals are consistently described as clear, with one review adding that word clarity is especially strong.

Cross-platform use is broadly positive across phones, tablets, and computers; iOS works well, though several reviewers still note Apple ecosystem extras remain a separate advantage for AirPods users.

Both reviews support broad compatibility across modern smartphones, laptops, and multiple tested devices.

Multipoint is a meaningful quality-of-life feature and is mostly described as seamless for switching between two devices, with occasional notes that pausing one stream before starting another helps.

No summary yet.

Both reviews praise passive isolation from the eartips, with one calling it surprisingly strong for the price.

Portability is mixed: the case is pocketable but noticeably larger than key competitors, and runners often find it inconvenient to carry during workouts.

Pocket portability is weakened by cable tangling, even though the earbuds themselves are compact.

Preset EQ profiles are described as basic and not always effective at fixing core tuning preferences, especially for listeners sensitive to boosted bass or treble.

In-ear detection and related sensors are supported and configurable; at least one review suggests turning detection off if it contributes to unwanted playback behavior or stutters in edge cases.

Setup is usually straightforward, but several reviews emphasize the app is effectively mandatory for fully managing features like multipoint, modes, shortcuts, and certain tuning behaviors.

Setup is extremely simple, with one review calling the interface plug-and-play.

Overall sound is widely praised as rich, engaging, and detailed, though it is not tuned for strict neutrality; a few reviewers find the stock profile too boosted at the extremes and harder to correct due to limited EQ.

Both reviews describe the CX 80U as strong-sounding budget wired earbuds, emphasizing detailed, balanced audio with only low-bass caveats.

One review describes an immersive sense of space, supporting modest soundstage depth for the category.

Soundstage is commonly described as roomy and spacious for earbuds, with immersive modes able to expand the sense of space further (sometimes with tonal side effects).

One review directly praises the wide soundstage created by the eartip seal and in-canal presentation.

Spatial/immersive audio features are robust and can sound more natural than many implementations, but not everyone prefers the processing, and it typically reduces battery life.

Fit security is a major strength thanks to stability bands/wings, with several reviews calling them suitable for workouts and even running, though some users mention footstep thud in ANC mode.

One review says the earbuds stayed in place at a desk and while walking.

Touch responsiveness is generally strong and often praised for quick gesture recognition, but sensitivity can lead to accidental triggers during fit adjustments or certain activities.

Transparency/Aware mode is generally clear and natural, with useful loud-spike handling in some implementations, but several reviewers still place it behind the very best competitors and note occasional hiss or wind sensitivity.

Treble is often described as crisp and detailed without obvious harshness for many, though some reviews report boosted regions that can fatigue sensitive listeners and note limited EQ control to tame it.

Treble earns strong marks in both reviews for staying vivid and controlled without turning harsh or shrill.

USB-C charging is standard and widely appreciated, with fast-charge behavior commonly referenced for quick listening time boosts.

USB-C support is a core strength, with both reviews highlighting plug-and-play use and modern device compatibility.

Both reviews consider the CX 80U excellent value, citing strong sound for a sub-$40 budget price.

Voice assistant support is present via shortcut customization, with practical use reported (including Google Assistant), though it is not typically positioned as a headline differentiator.

Volume output is frequently described as loud and satisfying, with enough headroom for travel and commuting environments.

One review indicates the CX 80U can get loud enough for percussion and treble details to carry character.

An IPX4 rating is repeatedly cited as sufficient for sweat and light rain, appropriate for workouts but not for full submersion scenarios.

Water resistance is a limitation because one review says there is no stated waterproof rating.

One review specifically praises the light bud weight, which helps comfort during use.