Compare Technics EAH-AZ100 Earbuds vs Sennheiser CX 80U Wired Earbuds

ANC is widely rated top-tier for everyday noise and transit rumble, but several reviews stop short of calling it the absolute best in the category. Noise control is highly adjustable, with adaptive ANC plus granular sliders that let you tune intensity and reduce pressure effects.

USB-C compatibility is a clear strength, with successful use on Android phones in both reviews and no reported compatibility issues.

The Technics Audio Connect app is feature-rich (ANC, EQ, multipoint, spatial settings), but some reviews call the interface clunky or menu-heavy.

There is no companion app, which is typical for wired earbuds but still limits customization and feature depth.

Several reviews explicitly note aptX codecs are not supported.

Where tested, audio-video sync is reported as excellent with minimal to no noticeable lag.

Bass is repeatedly called deep and unusually controlled for true wireless, though one review found it can feel heavy or change with ANC settings.

Bass is punchy, agile, and clean rather than bloated, but both reviews suggest the very lowest bass lacks some rumble and weight.

Battery life is commonly reported around 10 hours with ANC on (AAC) plus substantial case recharges, with lower figures when using high-res modes.

Bluetooth stability is generally reported as reliable with few dropouts across devices and environments.

Build quality is viewed positively, with one review specifically calling it impressive for such an inexpensive wired model.

One review specifically highlights the integrated DAC and 24-bit/96kHz playback support as a real value-add for budget wired listening.

The in-line controls are easy to press and responsive, but overall functionality is basic and volume adjustment is a notable limitation.

The cable looks slim and tidy, but the non-flat design can bunch up and tangle in a pocket.

The case is generally pocketable and premium-feeling, but some reviews mention weak magnets, slight rattle, or scratch/scuff issues.

Charging is praised for USB-C plus Qi wireless and quick-charge support; full recharge times are typically a few hours.

Codec support is strong (SBC/AAC plus LDAC and LC3/LE Audio features noted), appealing to both iOS users and Android audiophiles.

Comfort is widely rated high thanks to a smaller/lighter fit, though some users may still experience fatigue or fit variability over long sessions.

Comfort is one of the strongest recurring themes, with both reviews describing long listening sessions as easy and irritation-free.

Design is viewed as premium and more compact than the prior model, though not everyone finds it the sleekest-looking option.

The CX 80U looks understated and practical overall, with one reviewer liking the classy silver accents while another found the design too plain to stand out.

Multiple ear tip sizes are commonly included, helping most users achieve a seal, though tip choice remains key to fit.

Multiple eartip sizes help users dial in both comfort and seal, which directly supports the earbuds' fit and passive isolation.

EQ customization is a strength, often cited as an 8-band EQ plus presets that can significantly change the sound.

There is effectively no EQ customization here, so users cannot tailor the sound profile beyond tip choice and source settings.

Find My/location features are present, but feedback varies; some appreciate the feature, while others complain the locating beep or accuracy is limited.

Reviewers consistently describe the tuning as balanced and accurate for the price, with natural vocals, convincing tonal balance, and good detail retrieval.

The accessory bundle is basic but useful, mainly centered on extra eartips rather than premium extras.

Instrument separation is frequently praised on busy tracks, helping the AZ100 stay clean and layered.

Layering and separation are generally good for a budget model, though one review noted that mids are not as distinctly separated as on pricier alternatives.

An in-line mic is included for calls and voice use, but it feels more functional than premium.

LDAC support is frequently highlighted for higher-quality Android streaming, with the usual battery-life tradeoff.

At higher listening levels, the earbuds stay controlled and avoid the harsh or tinny edge that often hurts cheap wired earbuds.

Voice noise reduction is often effective at cutting wind and background noise, though aggressive processing can create artifacts.

Call quality is mixed: many find it usable or improved, while others report robotic processing or, in one case, serious call glitches.

Mic performance is acceptable but not exceptional, with decent vocal clarity offset by noticeable static in one review.

Midrange is generally clear and natural for vocals, with occasional notes that bass-heavy mixes can push voices slightly back.

Mids are clear and robust, especially for vocals and acoustic material, though they do not reach the finesse of more expensive earbuds.

Cross-device compatibility is excellent for a wired USB-C model, with smooth use reported on phones, tablets, and laptops.

Three-device multipoint is a major differentiator and is often described as seamless; occasional switching lag is mentioned but not common.

Passive isolation is a standout strength, with the seal doing a surprisingly strong job of reducing office chatter and everyday outside noise.

Preset EQ options are generally useful, though some (like extra-bassy modes) may be too much for neutral listeners.

Case finish durability is mixed, with some noting scratches/scuffs and others calling it relatively scratch-resistant.

Setup is mostly straightforward, but the lack of a case pairing button and some app UX quirks can add friction.

Setup is about as simple as it gets: plug in the USB-C connector and start listening with no app, pairing, or extra steps required.

Reviews consistently praise the AZ100 for highly detailed, spacious sound with strong dynamics; a few note the default tuning can be bass-forward or benefit from EQ.

Sound quality is the main reason to buy the CX 80U, with both reviews describing it as unusually refined, detailed, and balanced for the price. The wired USB-C path delivers clean, detailed playback and is a big part of why these earbuds outperform many cheap rivals.

Soundstage is a standout: multiple outlets describe an immersive, wide presentation that feels larger than typical earbuds.

The presentation has more openness and spatial breathing room than expected at this price, helping the earbuds sound immersive rather than cramped.

Dolby spatial audio/head tracking is supported and can add immersion, but some reviewers find it subtle or prefer it off for music.

Fit stability varies: many report a secure hold, while some reviewers experienced looseness or buds falling out during vigorous movement.

With the right eartips, the earbuds stay in place well enough for desk use and walking.

Touch controls are responsive and highly configurable, with the main complaint being occasional over-sensitivity.

Transparency/ambient mode is strong and adjustable, but some reviewers note hiss at higher levels, an unnatural voice-focused mode, or not enough outside sound for awareness.

Treble is described as airy and detailed without harshness, but a few critics wanted more sparkle or presence.

Treble is vivid and expressive without turning harsh, which helps preserve detail and a sense of space.

USB-C charging is consistently supported and frequently mentioned as a modern convenience.

USB-C is a major advantage here, making the earbuds feel current and widely usable across modern devices.

The earbuds are commonly cited as IPX4-rated for sweat and light rain, but not for heavy water exposure.

No water-resistance rating is highlighted, so these are a poor fit for buyers who need workout or rain-friendly earbuds.

The earbuds are very light, which contributes to their easy long-session comfort and unobtrusive feel.