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Sennheiser HDB 630: two-minute review
What happens when you cut the wires off your audiophile-grade headphones and fit a Bluetooth module inside, then add a USB-C dongle to the box so people can hear them at their best? You get the Sennheiser HDB 630. These wireless headphones are intended to deliver ‘hi-res’ Bluetooth audio to anyone, no matter which smartphone you’re using – yes, even an iPhone.
To achieve this, Sennheiser has bundled in its BTD 700 dongle, which opens up access to the aptX, aptX HD and aptX Adaptive codecs, and up to 24-bit / 96kHz streaming quality. Just plug the USB-C dongle into your phone, pair it to the Sennheiser HDB 630, mkae sure your file quality is of the desired standard and you’re good to go.
Of course, some data is lost when streaming over Bluetooth, but still, the audio quality here is exceptional and deserving of Sennheiser’s HD (ie. reference grade) lineup. I was very impressed by the beautifully balanced, textured, and well-separated performance of the HDB 630, which outperformed even some of the best headphones I’ve examined on this price-range.
They have a impartial tuning out of the field, which plenty of audiophiles will respect – the bass is way from overbearing, although it stays punchy and responsive. A bump within the higher midrange usually offers vocals a bit bit of additional room to precise themselves too, whereas treble is managed and by no means too intense.
With parametric EQ and crossfade capabilities, you too can adapt the sound to your particular tastes – there’s a lot customizability to entry with the Sennheiser SmartControlPlus companion app.
And that applies to extra than simply sound. There’s customizable energetic noise cancellation, together with a transparency mode, and a standalone adaptive configuration. These all work successfully, and though you received’t get absolute top-tier noise-crushing skills right here, the HDB 630 have been capable of preserve me fairly centered on my music throughout a flight and when working at my workplace.
One factor that I want was a bit extra tweakable, although, is the contact controls. Some of those perform decently, however a pair really feel a bit clumsy to make use of, like quantity adjustment and a single-touch play/pause possibility. Similarly, the On-head Detection could be very delicate, and the cans generally activate even with a small knock. All of this may be switched off, however rivals just like the Sony WH-1000XM6 supply way more intuitive controls.
Back to the positives although. Something that actually wowed me concerning the HDB 630 was their glorious battery life. Considering plenty of high-level rivals on this vary solely supply round 30 hours of playtime, the 60 hours you get right here – with ANC on, by the way in which – is totally distinctive. I barely ever needed to cost these cans throughout my month of testing, and that in itself is a large profit.
In truth, apart from the marginally unrefined contact controls, most of my criticisms are minor. I skilled a couple of inconsistencies with mic high quality when utilizing the BTD 700 dongle, and I’d say that these aren’t fairly the comfiest cans ever. But nonetheless, they’re cosy sufficient to maintain on for longer listening classes, and with out the dongle, the mic high quality is excellent.
Overall, these cans make a spectacular wi-fi debut into Sennheiser’s beloved HD6XX line. They provide revealing, immersive audio, buckets of playtime, and a wealthy set of options. Sure, there are a couple of imperfections right here and there, but when we’re speaking sound for pound (or greenback, and so on.) worth, then the Sennheiser HDB 630 are a tempting possibility, and straightforward to advocate.
Sennheiser HDB 630 review: price & release date
- $499 / £399 / AU$999
- Launched in October 2025
The Sennheiser HDB 630 were revealed at the beginning of October 2025, and are available to order now. They’re the first wireless pair of headphones to join Sennheiser’s beloved 6XX range, rather than slotting into the Momentum or Accentum family, but they feel like a natural upgrade over the Sennheiser Momentum 4 Wireless, sonically talking.
As a premium pair of wi-fi headphones, these include a reasonably excessive price ticket. They’ll set you again $499 / £399 / AU$999, which is in an analogous ballpark to top-tier wi-fi choices just like the Sony WH-1000XM6 and Bowers & Wilkins Px7 S3 – extra on each of these later.
Sennheiser HDB 630 review: specs
|
Drivers |
42mm dynamic |
|
Active noise cancellation |
Yes |
|
Battery life |
60 hours (ANC on) |
|
Weight |
311g |
|
Connectivity |
Bluetooth 5.2, 3.5mm, USB-C |
|
Frequency range |
6Hz-22kHz |
Sennheiser HDB 630 review: features
- Well-engineered adaptive ANC and passthrough modes
- Fleshed-out companion app with parametric EQ and crossfeed
- Comes with Sennheiser BTD 700 transmitter for better Bluetooth audio
When it comes to features, Sennheiser has put a lot of care into delivering just about everything you could want from wireless headphones.
Let’s start with some of the flashy inclusions that you’re not going to find from most rivals. First up, we’ve got parametric EQ. This grants users with granular control over the frequency they want to change, along with gain and Q-factor. So, if you’ve got a very precise sound in mind, you’ll easily be able to adapt the headphones to it.
In my experience, parametric EQ worked very nicely, and there are clear instructions in the Sennheiser SmartControlPlus app for how to get the best out of it. I generally stuck with the default sound, but tried making an altered tuning with a slight low-end bump, which was fun to configure.
Next, let’s talk about crossfeed – something I’d never used on a rival pair of the best over-ear headphones. Essentially, this can be utilized to mix the left and proper audio channels for a extra balanced presentation – particularly helpful if a recording has excessive channel separation and many of the bass solely performs from the appropriate aspect, say.
I attempted this characteristic out with Purple Haze by Jimi Hendrix – a person who liked to maneuver sound throughout the stereo subject for a singular listening expertise. When cranking crossfade as much as excessive, vocals – which initially have been centered into the appropriate channel – have been considerably extra balanced. Personally, I had no challenge with the unique sound, so I hardly ever used crossfeed, nevertheless it does work effectively, and I’m certain some will get pleasure from utilizing it.
Perhaps the star characteristic of the HDB 630 is their higher-res Bluetooth audio assist. To make use of this, you’ll be able to plug within the included BTD 700 dongle, which opens up entry to aptX, aptX HD, and aptX Adaptive codecs – even should you’re on iPhone.
Anyway, the BTD 700 will allow you to stream audio in higher-than CD high quality – 24-bit / 96kHz (albeit with some loss incurred by Bluetooth transmission itself). That signifies that nice high quality music turns into accessible to simply about any fashionable system – extra on the precise audio efficiency later, although.
Another one of many HDB 630’s main options is energetic noise cancellation. I used to be very happy with the general efficiency right here, even when it received’t evaluate to main gamers on this subject, just like the Bose QuietComfort Ultra Headphones Gen 2. One small factor: the HDB 630 set the ANC degree to 60% by default, maybe for the perfect steadiness sonically, however for testing functions I cranked this as much as 100%.
On a flight to Copenhagen, the low rumble of the jet engine was massively subdued, whereas discussions round me have been mainly inaudible. And that was when listening to music at about 60% quantity, by the way in which. Some larger pitched sounds – like the press of seatbelts – did creep by means of, however I used to be nonetheless impressed with the HDB 630’s noise nixing skills.
Adaptive mode is dynamic and efficient too, however you too can entry a transparency mode with the customized settings. This is a perfect choice should you’re somebody that prefers to have measure of your environment. There’s additionally an choice to activate anti-wind noise, or just flip noise cancelling off fully.
Sound zones is one other attention-grabbing characteristic that lets you set an EQ preset and ANC degree relying in your location. You can save various areas, and the headphones will seamlessly slip into your chosen settings, as long as you’re inside a sure radius of the related space.
A fast phrase on battery life too. You get an impressive 60 hours of playtime from the HDB 630, even with ANC on. That’s very spectacular certainly, and matches the battery lifetime of the five-star-rated Sennheiser Momentum 4 Wireless.
One key challenge I bumped into throughout my time with the HDB 630, was that decision and recording high quality would endure considerably if I used to be utilizing the BTD 700 dongle. Similarly, if I ended a name, when my music continued to play it generally sounded fuzzy. The SoundConnectPlus app would additionally generally fail to work after I had the dongle inserted, although this wasn’t all the time the case. These points could be solvable with updates and such – however the name high quality challenge was particularly unlucky, as with out the dongle, name high quality on the HDB 630 is powerful.
All in all, although, there’s simply a lot to sink your tooth into on the HDB 630, and if you need extremely customizable listening experiences, it doesn’t get a lot better than this.
Sennheiser HDB 630 review: sound quality
- Immersive, detailed audio performance
- Audiophiles will likely appreciate more neutral default tuning
- Hi-res audio sounds fantastic with BTD 700 transmitter
Now, for anyone familiar with Sennheiser’s name, you’ll know that the company is known for knocking out stellar sounding audio gear time after time. And the HDB 630 continue that trend. I was very impressed with the clarity, detail, and width of the audio these headphones conjure up — and at this price, you’re not going to find a lot of rivals that do better.
The HDB 630 have a pretty neutral sound out of the box. Bass is punchy, but not overly assertive, with a significant dip in the sub-100Hz range compared to the Momentum 4. Mids never get drowned out, with vocals often given a lift thanks to a slight bump in the upper mid-range. Meanwhile, treble is perhaps a little more tempered than I’m used to on a lot of wireless headphones, but this results in a controlled presentation, with sounds in the upper-range never coming across as over-eager or tinny.
When listening to Black Eye by Allie X, I was impressed with the brilliantly defined, assertive vocals, which were carefully separated from the pumping low-end and electronica in the background. Finer details like light percussion came through clearly, while electric guitars in the lower mid-range – which can sometimes sound muddied with middling or poor quality cans – were given a fair amount of room to play.
Rains again by Solji – a softer ballad – was the exact kind of track the HDB 630 could excel with. The higher-pitched vocals floated were beautifully emotive and well-positioned in the mix, with soft acoustic guitars, as well as soft strings and keys all replicated in a tonally accurate, expressive manner.
Turning to a deeper track like Spaceship by Marsolo, this is where things may require some tweaking. The ambient sounds and almost otherworldly effects that enter into the track were exceptionally clear and well-positioned, though the bass itself – despite being rapid and responsive – lacked a little bit of bite for my personal taste.
Thankfully, this wasn’t too much of an issue, though. There is a bass boost toggle for moments where you want a low-end lift in a pinch, and extensive EQ presets and custom options if you want a deeper tuning.
I tried my own custom tuning, using parametric EQ, and Left And Right by D’Angelo sounded incredibly immersive, thanks to the controlled, texture bass, expertly layered vocals, and impactful yet disciplined percussion in the treble range. The wide soundstage created an almost three-dimensional listening experience, and that’s something that a fair few rivals in this price range can’t offer.
For reference, I spent the majority of my time listening with the BTD 700 dongle and the aptX Adaptive codec – this genuinely makes a difference with the HDB 630, opening up a more full-sounding, revealing listen. I also tried wired listening, and was again delighted with the responsive, elegantly balanced performance of the HDB 630. These are an excellent-sounding pair of headphones for the cost – they deliver exactly what they aim to: audiophile-friendly sound, without the cable.
Sennheiser HDB 630 review: design
- Wired headphone vibe, wireless design
- Could look a little more premium, in my view
- Touch controls and auto-on feel a little clumsy
It’s been an almost perfect start for the HDB 630 so far, but the design department is where the picture is a little bit more mixed.
First up, let’s talk about looks. The HDB 630 have an appearance that’s befitting of their purpose. Visually, they’re almost more like closed-back wired headphones, minus the wires – and I’m a fan of that synchronicity.
However, for me, they just don’t look quite as premium as I’d hope for headphones in this price range. The silver sections that connect the headband to the earcups have an almost plasticky look, which contrasts the luxurious-looking headband and leatherette earcups. They still look pretty good overall, and this is largely a matter of personal preference – but I think some rivals, like the Bowers & Wilkins Px7 S3 have a sleeker overall aesthetic.
Something that’s less subjective, however, is the quality of touch controls on the HDB 630. Personally, I’m a touch controls guy – controversial, I know. But I didn’t always find them to be intuitive here. When flicking up, volume would occasionally rise too drastically, and the single touch requirement to pause music meant that it was too easy to accidentally play or pause my tunes.
Unfortunately, touch controls can’t be customized – it’s either on, or off – which is a bit of a shame, as I would’ve liked to try tailoring them to my preferences. To give the HDB 630 their flowers, some functions, like skipping or returning to the previous track, worked great. Call controls functioned well too.
It was a similar story with On-head Detection, which seemed a little clumsy. On a couple of occasions, I’d give the headphones a knock when they were on my desk, and they’d auto power-on, connect to my phone, and start playing my music out. That was a little frustrating, and led to me later turning the feature off, even though the smart pause function worked really nicely when removing or re-wearing the headphones.
On the positive side, these headphones are fairly comfortable for longer listening sessions. I definitely think that my day-to-day headphones, the Sony WH-1000XM6 feel lighter and comfier in-use, but the HDB 630 didn’t feel tight on my head or harsh on my ears. They also offered a secure fit during my flight and whenever I was out and about.
Unlike headphones such as the Sony WH-1000XM4, the HDB 630 do not fold up. That means they don’t seem to be essentially the most compact round. But when it is advisable take them out and about, you can also make use of the included carry case, which is constructed to a excessive normal. It feels very sturdy, and is effectively protected in opposition to scuffs or scratches. It’s a bit massive and makes use of a zipper somewhat than my choice of magnets, nevertheless it’s nonetheless a really welcome inclusion.
Sennheiser HDB 630 review: value
- Fairly priced for the sound quality on offer…
- …even if you can get better ANC and comfort from some rivals
- Incredible feature-set, even against competitors
When it comes to value for money, the Sennheiser HDB 630 score nicely – yes, even though they’re not the cheapest headphones out there.
For the money you pay, you get absolutely wonderful sound quality, and the inclusion of the BTD 700 dongle opens up higher-res Bluetooth listening to anyone – even iPhone listeners, who are frequently left behind in that domain.
Even in a side-by-side comparison with my similarly priced Sony WH-1000XM6, I felt that the HDB 630 performed exceptionally, offering a slightly more open, revealing sound. The XM6 arguably have a more ‘exciting’ profile out of the box, but with a little tuning, there’s not much the HDB 630 can’t do.
Looks-wise and comfortability-wise, the HDB 630 are solid – not the best in class but certainly not bad. But they sure do stand out when it comes to features. Parametric EQ, crossfade, adaptable ANC, and a ton of battery life. All of that combined with the sound you get? That’s plenty of bang for your buck.
Should I buy the Sennheiser HDB 630?
|
Attributes |
Notes |
Rating |
|---|---|---|
|
Features |
Wide feature-set, detailed-oriented sound options, dongle opens up great audio quality, though can cause some functionality issues. |
4.5/5 |
|
Sound quality |
Beautifully balanced, textured, detailed, and personalizable sound. |
5/5 |
|
Design |
Touch controls and auto-pause can be clumsy, good-looking and comfortable overall, but some rivals have nicer appearance and feel |
3.5/5 |
|
Value |
Incredible sound and feature-set for the price you pay. |
4.5/5 |
Buy them if…
Don’t buy them if…
Sennheiser HDB 630 review: also consider
| Header Cell – Column 0 |
Sennheiser HDB 630 |
Sony WH-100XM6 |
Bowers & Wilkins Px7 S3 |
|---|---|---|---|
|
Price |
$499 / £399 / AU$999 |
$449 / £399 / AU$699 |
$479 / £399 / AU$699 |
|
Drivers |
42mm dynamic |
30mm dynamic |
40mm dynamic |
|
Active noise cancellation |
Yes |
Yes |
Yes |
|
Battery life |
60 hours (ANC on) |
30 hours (ANC on) |
30 hours (ANC on) |
|
Weight |
311g |
254g |
300g |
|
Connectivity |
Bluetooth 5.2, 3.5mm, USB-C |
Bluetooth 5.3, 3.5mm |
Bluetooth 5.3, USB-C, 3.5mm (via USB-C to 3.5mm cable) |
|
Frequency range |
6Hz-22kHz |
20Hz-20kHz |
10Hz-20kHz |
How I tested the Sennheiser HDB 630
- Tested for one month
- Used in the office and on a flight
- Predominantly tested using Tidal
I spent one month testing the Sennheiser HDB 630, taking them just about everywhere I went. Of course, I used them at the office during standard work hours, but I also used them at home, while out on walks, and even on a flight.
While listening to music, I predominantly made use of Tidal to be able to benefit from the 24 bit / 96 kHz high quality audio – one thing that Spotify lossless isn’t able to. I tuned into the TechSwitch testing playlist, which options tracks from a variety of genres, but additionally bumped a variety of songs from my personal music library.
On high of that, I exhausted the varied options on the HDB 630, like crossfeed, parametric EQ, and ANC. Where applicable, I in contrast the headphones in opposition to my trusty Sony WH-1000XM6, which helped to evaluate features like sound high quality and design.
- First reviewed: October 2025
- Read extra about how we test