Audio-Technica ATH-ADX3000 vs Sennheiser HDB 630 | TechTalkTown
Audio-Technica ATH-ADX3000 vs Sennheiser HDB 630
Audio-Technica ATH-ADX3000
Audio-Technica
8
A featherweight, hyper-detailed open-back — for treble lovers
Sennheiser HDB 630
Sennheiser
8.5
The best-sounding wireless headphone — if ANC isn't your priority
Audio-Technica ATH-ADX3000
What Reviewers Agree On
Exceptionally light at roughly 257g, with a 3D wing-support headband that makes the headphones effectively disappear during long listening sessions
Class-leading detail retrieval, resolution and clarity for a $999 dynamic-driver open-back — reviewers say it goes toe-to-toe with pricier planar headphones
Premium build quality despite the low weight, with a refined open-air design and replaceable plush velour ear pads
A genuinely open, airy presentation with good instrument separation and a coherent, holographic soundstage
Strong value at the $999 price for buyers who want technical, audiophile-grade performance from an easy-to-style headphone
Deal Breakers
Pros & Cons
Audio-Technica ATH-ADX3000
Pros
Exceptionally light at roughly 257g, with a 3D wing-support headband that makes the headphones effectively disappear during long listening sessions
Class-leading detail retrieval, resolution and clarity for a $999 dynamic-driver open-back — reviewers say it goes toe-to-toe with pricier planar headphones
Premium build quality despite the low weight, with a refined open-air design and replaceable plush velour ear pads
A genuinely open, airy presentation with good instrument separation and a coherent, holographic soundstage
Detailed Comparison
Sound Quality
Audio-Technica ATH-ADX3000
The ADX3000 is built around a 58mm dynamic driver and tuned bright and detail-forward. Reviewers consistently praise its resolution, clarity and dynamic punch, but the lively treble — with a sharp peak near 4 kHz — divides opinion, and sub-bass rolls off for those who want low-end slam.
Delivers resolution, clarity and technical performance that reviewers say is incredible for the price — the only dynamic-driver headphone in this range that can go toe-to-toe with pricier planars like the HiFiMan Arya Organic.
Tuned bright and hyper-focused with an emphasis on the upper mids and lower treble — human voices, violins, pianos and acoustic guitars sound more lifelike, though the treble peak makes the overall tonal balance a little wonky.
There is a sharp peak right around 4 kHz; on a 10-band EQ you can pick the 4 kHz band and drop it by 4-5 dB to tame the brightness as a starting point.
TechTalkTown may earn a commission from purchases made through links below. As an Amazon Associate I earn from qualifying purchases. This does not influence our reviews. Learn more.
Bright, treble-forward tuning with a sharp peak near 4 kHz that can sound harsh or fatiguing, especially for treble-sensitive listeners
Sub-bass rolls off below roughly 50-60 Hz — bass-focused listeners will find it lacks visceral low-end slam without EQ
Purely passive and wired — no Bluetooth, no ANC, no microphone and no battery, so it is unsuitable for commuting, calls or travel
Uses a proprietary A2DC connector and ships with a mediocre stock cable, so cable upgrades mean buying into a less-common termination
Sennheiser HDB 630
What Reviewers Agree On
Best-sounding wireless headphone in its class — a warm-neutral, natural HD 600-style tuning that reviewers rank above the Sony WH-1000XM6, Bose QC Ultra and AirPods Max
Class-leading 50-60 hour battery life with ANC on (independently measured at ~54 hours), with a 10-minute quick charge returning ~7 hours and a ~1.5-2 hour full charge
True hi-res wired and USB-C listening at 24-bit/96kHz, plus an included BTD 700 dongle that delivers aptX Adaptive to any device — solving the iPhone/Windows codec gap in hardware
An exceptionally deep companion app with a 5-band professional parametric EQ (adjustable frequency, Q and shelves) that reviewers call the best EQ in any wireless headphone
Sound stays consistent as the battery drains and the headphone runs equally well wired, wireless or via the dongle — genuine flexibility for audiophiles
Good all-day comfort with plush, beefed-up padding and a folding, travel-friendly design
Deal Breakers
Active noise cancellation is the weakest of the premium flagships — clearly outclassed by Sony, Bose and Apple, especially on mid-frequency chatter and low rumble
The build is largely plastic and feels under-built for a $500 headphone, with reviewers wishing for metal in the headband or cups
Ear pads are not the most spacious — larger ears touch the inside, and the clamp can require a break after about two hours for some wearers
Microphone and call quality are mediocre, with the mic optimized only to ~10kHz so even the BTD 700 dongle's wideband codec brings little improvement
Touch controls are the slowest-responding of the premium pack, and some early units had touchpad/wear-detection bugs in multipoint mode
Strong value at the $999 price for buyers who want technical, audiophile-grade performance from an easy-to-style headphone
Cons
Bright, treble-forward tuning with a sharp peak near 4 kHz that can sound harsh or fatiguing, especially for treble-sensitive listeners
Sub-bass rolls off below roughly 50-60 Hz — bass-focused listeners will find it lacks visceral low-end slam without EQ
Purely passive and wired — no Bluetooth, no ANC, no microphone and no battery, so it is unsuitable for commuting, calls or travel
Uses a proprietary A2DC connector and ships with a mediocre stock cable, so cable upgrades mean buying into a less-common termination
Sennheiser HDB 630
Pros
Best-sounding wireless headphone in its class — a warm-neutral, natural HD 600-style tuning that reviewers rank above the Sony WH-1000XM6, Bose QC Ultra and AirPods Max
Class-leading 50-60 hour battery life with ANC on (independently measured at ~54 hours), with a 10-minute quick charge returning ~7 hours and a ~1.5-2 hour full charge
True hi-res wired and USB-C listening at 24-bit/96kHz, plus an included BTD 700 dongle that delivers aptX Adaptive to any device — solving the iPhone/Windows codec gap in hardware
An exceptionally deep companion app with a 5-band professional parametric EQ (adjustable frequency, Q and shelves) that reviewers call the best EQ in any wireless headphone
Sound stays consistent as the battery drains and the headphone runs equally well wired, wireless or via the dongle — genuine flexibility for audiophiles
Good all-day comfort with plush, beefed-up padding and a folding, travel-friendly design
Cons
Active noise cancellation is the weakest of the premium flagships — clearly outclassed by Sony, Bose and Apple, especially on mid-frequency chatter and low rumble
The build is largely plastic and feels under-built for a $500 headphone, with reviewers wishing for metal in the headband or cups
Ear pads are not the most spacious — larger ears touch the inside, and the clamp can require a break after about two hours for some wearers
Microphone and call quality are mediocre, with the mic optimized only to ~10kHz so even the BTD 700 dongle's wideband codec brings little improvement
Touch controls are the slowest-responding of the premium pack, and some early units had touchpad/wear-detection bugs in multipoint mode
Bass extends down with a W-shaped lift around 100 Hz and the sub-bass is described as quite nice, but it is not as visceral or punchy as the pricier ADX7000 or Caldera Open.
Bass distortion was not something this reviewer could provoke even as a bass-heavy listener — the driver stays clean under pressure.
Soundstage is open and airy with good left-to-right separation, but it does not feel huge — instruments revolve around you rather than spreading out wide, and it does not match the Focal Utopia.
The relaxed mid-range followed by a more forward treble makes the presentation clinical and superb for detail retrieval, but that treble energy can become fatiguing over long sessions depending on how you listen.
Treble-sensitive listeners report the top end is spicy and present, with clarity and extension — noticeable but not enough to cause ear discomfort the way some bright headphones do.
Reviewers report the drivers benefit from roughly 100 hours of mechanical break-in, after which the treble peak and midrange prominence chill out and more sub-bass impact comes through.
Sennheiser HDB 630
The HDB 630's headline strength. Reviewers describe a warm-neutral, natural HD 600-series tuning with a standout midrange, an open and spacious soundstage for a closed-back, and enough neutrality to make it the most EQ-friendly wireless headphone on the market. The consensus is that it is the best-sounding wireless headphone at $500.
Crinacle calls it the best-sounding premium wireless headphone available today — nothing is over- or under-emphasised, everything just sounds natural and 'normal'.
The Headphone Show says that even without touching the app or EQ, the HDB 630 is the best-sounding wireless noise-cancelling headphone in its price range.
GadgetryTech calls it the best-sounding active Bluetooth headphone they've ever heard out of the box — tuned better than most or all closed-back Bluetooth headphones.
The tuning carries classic HD 600-series traits — a warm-neutral balance and a great midrange — though one reviewer flags a slightly slow bass.
The midrange is the standout of the tuning, and Picky Audio named the HDB 630 best-sounding headphone of 2025 for its rare balanced tuning.
There is a slight forward character in the 1-2kHz midrange and a low-treble forwardness around 3-4kHz; the bass stands out in good ways without being a bass-boost machine.
Joshua Valour says soundstage width, placement and fidelity keep up with the best closed-backs, though they still can't match the best open-backs for soundstage.
A Reddit owner describes it as the most crystal-clear, almost open-back-sounding closed-back headphone they have ever heard, and was surprised by the soundstage.
Soundnews estimates soundstage and depth improved by roughly 20-25% over the Momentum 4.
Dissent: an older review of a different Sennheiser model warns the brand's bass-heavy tunings aren't ideal for classical or vocal music — but HDB 630 reviewers consistently describe a far more neutral, balanced signature.
Comfort & Design
Audio-Technica ATH-ADX3000
The ADX3000's headline trait is its weight — around 257g makes it one of the lightest premium open-backs available. A 3D wing-support headband, plush velour pads and a low-but-firm initial clamp combine into a fit reviewers say quickly disappears.
Crazy light at 257g — a paperweight compared with most headphones in its class — and that lightness is a major comfort advantage for long sessions.
Audio-Technica navigated the usual lightweight trade-off well — it stays very lightweight and comfortable yet still feels and looks extremely premium.
The 3D wing-support system plus plush velour pads mean the padding mostly touches the skull rather than clamping, which helps avoid headphone fatigue and makes it easy to forget the headphones are on.
Measured clamp force is around 600-750g — it can feel a little firm the moment you put it on, but the combination of weight, soft pads and clamp means it very quickly becomes one of the least intrusive headphones this reviewer has worn.
One reviewer found this the least comfortable of the headphones in a comparison group, a reminder that fit is head-shape dependent despite the low weight.
Build quality is high-end — reviewers describe super high-end quality and build, with a simple black open-back-with-mesh-grille aesthetic rather than flashy luxury materials.
Left/right channel markings on the cups are small and easy to miss, and the stock cable carries no side marking — a minor everyday annoyance.
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.
Wired & Hi-Res Listening
Audio-Technica ATH-ADX3000
The ADX3000 is a purely passive wired open-back — no Bluetooth, no ANC, no battery. It ships with a 3m cable terminated in a 6.3mm plug and uses a proprietary A2DC connector. It is reasonably easy to drive but sensitive to amplifier output impedance.
This is a purely wired, passive headphone — there is no Bluetooth, no microphone and no active noise cancellation, and it is explicitly not designed for travel or commuting.
Ships with a 3m (about 10ft) cable terminated in a 6.3mm single-ended plug; reviewers call the stock cable mediocre and many swap it for an aftermarket balanced cable.
Uses Audio-Technica's proprietary A2DC connector rather than a universal 3.5mm or mini-XLR termination, so cable upgrades require buying into a less-common plug standard.
Rated around 32 ohms nominal, with measured impedance confirmed near 34 ohms — relatively easy to drive — but it has an impedance peak just over 100 ohms near 67 Hz.
The headphone is sensitive to amplifier output impedance: a high-output-impedance OTL amp (50-80 ohms) lifts the bass and warms the tonality noticeably, so amp pairing matters for the tuning you hear.
Tested across a wide range of sources — audio interfaces, an iPad, an iPhone and high-end desktop amps — the ADX3000 scaled well and clearly carried the Audio-Technica house sound throughout.
Sennheiser HDB 630
A headline feature that sets the HDB 630 apart from mainstream ANC rivals. It plays 24-bit/96kHz hi-res audio over USB-C or the 3.5mm analog cable, has an internal DAC, and ships with the BTD 700 dongle that adds aptX Adaptive to any USB-C device — solving the iPhone and Windows codec problem in hardware.
Via USB-C or 3.5mm you can hear audio in up to 24-bit/96kHz resolution, with the included BTD 700 dongle adding aptX Adaptive to devices that lack it.
Sennheiser quotes a 6Hz-40kHz frequency response over USB versus 6Hz-22kHz over standard Bluetooth — a genuinely broader hi-res window on the wired path.
BrandsWalk found the wired connection gave the cleanest sound reproduction 100% of the time, while wireless adapted to the environment and connection strength.
A USB-C cable can charge the headphones and carry a 24-bit/96kHz data pipe at the same time, and there is a desktop companion app for PC and Mac.
Headphones Pro Review frames the BTD 700 dongle as solving the iPhone codec problem in hardware — a $60 accessory included in the box.
Value vs Competition
Audio-Technica ATH-ADX3000
At $999, the ADX3000 is positioned against planar open-backs and Audio-Technica's own pricier ADX5000 and ADX7000. Reviewers broadly call it strong value for a buyer who wants technical performance, with the ADX3000-vs-ADX5000 question coming down to tuning preference.
Retails for $999 as an open-back single-driver headphone — reviewers call it a very good entryway into high-end headphones and could not find much wrong at the price.
Offers HiFiMan-style clarity and resolution combined with good dynamic punch, incredible build quality and very low weight — a combination reviewers say is hard to beat in this price bracket.
Versus the pricier ADX5000: some reviewers say the significantly cheaper ADX3000 actually has the better tuning, while others give the ADX5000 a higher-end feel and a slightly wider horizontal sound field.
For the price point it is a solid, near-the-top performer for accurate, lifelike balance between fundamentals and harmonics — though one reviewer stops short of calling it class-leading.
Buyers on a tighter budget who still want the Audio-Technica house sound can consider the much cheaper ATH-R50x or ATH-R70x, which are easier to drive and a fraction of the price.
Reddit owners frame the ADX3000 as a fun, clear, open headphone with a nice treble pop and consider it a worthwhile plunge for listeners coming from mid-tier sets like the Beyerdynamic DT1990.
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.
Joshua Valour likes the headphones but wishes the build quality felt a little more premium for $500.
BrandsWalk wishes the design were more premium at the price — even just swapping plastic for metal on the headband — but rates it the best Sennheiser of recent years.
Super Review points out the cups look like aluminium but are actually plastic, and the reviewer wishes they were finished in plain black.
Moon Audio praises exceptional all-day comfort, premium Japanese leatherette pads, a fingerprint-resistant matte finish and a travel-friendly folding design.
RTINGS warns the HDB 630 may not be the best choice for people who wear thicker-framed glasses, as the seal can be affected.
GadgetryTech notes generous ear clearance — about 5mm — which makes the difference between taking the headphones off mid-flight or leaving them on for hours; aftermarket pads (e.g. Wicked Cushion freeze pads) expand the cavity further at the cost of ~50g of added weight.
Sennheiser borrows a Crossfeed feature from its flagship HE 1 that blends the left and right channels to create a speaker-like presentation.
Caveat: the wired modes still require some battery power — the headphone is not a fully passive can with a dead battery.
Owner take: a Reddit user notes the hi-res wired path finally lets you get high-quality audio from PCs, Macs and iPhones that otherwise miss out on LDAC.
Headphones Pro Review calls it the most honest answer a wireless headphone has given at this price — 60 hours of battery, a $60 dongle included and a mastering-grade parametric EQ.
Versus the cheaper Momentum 4 (~$300-350), reviewers say the HDB 630 is a clear sonic step up but the Momentum 4 remains one of the best values for buyers who don't need the new app, EQ and wired hi-res features.
Owner take: a Reddit user who tested three $500 flagships found the HDB 630 the best-sounding of the trio but ultimately kept the Bose QC Ultra for its better blend of ANC, comfort and connectivity.
Owner take: a Reddit user calls the HDB 630 the best they've ever heard over Bluetooth when shopping for an AirPods Max alternative.
