Sennheiser HDB 630: The Best New Bluetooth Headphone?

As 2025 comes to a close, Sennheiser has come and introduced a new Bluetooth headphone right before the holidays. Following their wildly popular MOMENTUM 4, Sennheiser introduces the HDB 630, a hi-res wireless listening experience for $499.95. There has been a lot of hype around this headphone, and we’re here to give you all the information you need to know about it before you purchase. Will the HDB 630 beat out the new Sony XM6 or Bowers & Wilkins Px8 S2? This review will tell all.

To start, the HDB 630 looks very similar to the MOMENTUM 4. The Sennheiser logo is seen right on the edge of the headband, and the earcups are marked left and right so you can see the sides easily. The headband is made of a leatherette material as opposed to fabric, like in the MOMENTUM 4. The earcups are slightly smaller and have a bit of a bulkier build. This larger housing does not affect the weight. The HDB 630 is surprisingly lightweight for something that seems bulkier around the head. The touches of silver against the black also break up the darker aesthetic and make the HDB 630 a more premium-looking device. 

Using the HDB 630 is just like any other Bluetooth headphone. Turn it on, pair it to your device, and listening can begin! Controls are similar to those of the MOMENTUM 4, where the right earcup is the main touchpad. Swipe up and down for volume, back and forth for track changing, pinch in and out for noise cancellation adjustment, and tapping for play and pause. These controls come with a bit of a learning curve if this is your first high-end Bluetooth headphone, but users of the MOMENTUM, Sony XM6, or Beyerdynamic AVENTHO will be familiar with the controls. 

Active noise cancellation is strong and accompanied by loud sound reproduction. While the ANC on HDB 630 isn’t as strong as other headphones, the loudness of the headphones allows you to fully immerse yourself in listening. 

The Sennheiser HDB 630 comes with a host of new features that make it a step above the rest. The package includes the BTD 700, a USB-C dongle that gives you access to hi-res codecs. It’s perfect to use for gaming setups, for when you want to wirelessly connect the HDB 630 to your gaming console. Additionally, wired listening gets an upgrade with the availability of USB-C to USB-C listening. You still have the option to listen via 3.5mm, but for people looking to go directly into the phone, the USB-C cable is a nice option for charging and listening. Connecting in all these different ways allows your listening to know no bounds and be with you wherever and however you like.  

All of these physical features on the HDB 630 are great, but the real meat and potatoes come with the Sennheiser Smart Control Plus App. The new app comes with the same features as the old one: equalizer, sound zone settings, ANC adjustment, and battery tracking. Additionally, Sennheiser added features like parametric EQ and crossfeed. These two features were highlights for me, as they allowed me to customize my listening a step further.

For those unfamiliar, the parametric EQ works in the same way a regular equalizer works. You can choose your frequencies that you want to boost or cut, but with more precision. With the HDB 630, you can adjust the frequencies with more precision and change the curve on your graph. The visual graph they provide makes adjusting this easier than ever, as well as letting you A/B test the filters you create. For those who are very picky about frequencies and EQ adjustments, this feature is made for you.

The crossfeed feature is another element on the HDB 630 that is hit or miss, depending on the music you listen to. Turning on crossfeed makes the left and right channels bleed into one another. It is meant to mimic how a dual speaker setup would sound if you listened in a large room. For modern recordings that are already mixed and panned with precision, this feature isn’t anything too special that you need. For older recordings that have hard-panned instruments, it helps blend the elements together and create a more cohesive stereo image. 

• Ear coupling: Over-ear
• Ear pad material: Leatherette (synthetic)
• Resolution: Up to 24 bit / 96 kHz with USB-C, analog input, or BTD 700 Bluetooth® USB C Dongle
• Connectivity: Bluetooth 5.2
• Codec support: aptX™ Adaptive™, aptX™ HD, aptX™, AAC, SBC
• Frequency response: 
  • USB: 6 Hz – 40 kHz (only when using Line-In, USB (96 kHz) or Bluetooth with aptX adaptive (96kHz))
  • 6 Hz – 22 kHz (otherwise)
• Nominal impedance: Active 480 Ω
• Sound pressure level (SPL): 105 dB (1 kHz / 0 dBFS)
• THD, total harmonic distortion: <0.2 % (1 kHz / 100 dB SPL)
• Acoustic design: Closed-back
• Transducer: Electrodynamic (moving coil)
• Weight: 311 g (without cable)

SOUNDSTAGE & IMAGING

This is the part we’ve all been waiting for. How does the HDB 630 sound? The first thing I noticed was the truly fantastic immersive qualities. The soundstage was vast and had a similar width to that of the MOMENTUM 4. The thing that really set the HDB 630 apart was the depth. This headphone created a much deeper and bigger field of sound that I’ve only heard previously in headphones like the Focal Bathys or the Px8. I appreciated the placement of the instruments and the accuracy of the imaging. Orchestral arrangements sounded like they were being played right in front of me. The space in these headphones made the rest of the world fade away easily. 

The separation between instruments is highly impressive as well. You can hear the individual elements really well and distinctly, as if you were listening to a reference headphone. The HDB 630 has a very natural sound signature, coming in with balance that you’ll find in the MOMENTUM 4. Overall, the HDB 630 has a more dynamic sound signature. The MOMENTUM 4 lies a bit flatter and more forward, but the HDB 630 impresses with its depth, height, and natural coloration of all frequencies. 

BASS FREQUENCIES

Getting into the individual elements, the bass is the first on our list. You won’t need a bass boost filter to hear the low end in the HDB 630; it is powerful and driving in every genre. It sits a little behind the midrange to not overpower the whole signature. I would say it is definitely lighter than some other headphones’ bass response, but that isn’t to say it is completely lost. You still get to hear the bass and sub-bass with ease in genres like EDM, jazz, or rock, where the low end holds the most energy of the track. You can feel the HDB 630’s bass just as much as hear it, all while still maintaining detail and clarity throughout the frequency range. Especially at louder volumes, the bass gets this tactile quality that really immerses you in your listening. 

MIDRANGE FREQUENCIES

Midrange has a ton of detail that you can’t beat. This is a feature that people like from the MOMENTUM 4, but Sennheiser has taken that to the next level. The HDB 630’s midrange clarity and separation are like listening to reference headphones. The natural timbres and textures of instruments come through clearly without any distortion, allowing you to fully immerse yourself in your listening with ease. Vocal presentation in the HDB 630 is a highlight, where voices are right front and center with everything else filtering behind. It’s in this range that you hear the depth of the soundstage most prominently. I can’t overstate how precise the imaging was when listening to orchestral and big instrumental bands. The detail on the HDB 630 is incredible, making the midrange sound well above its price point. 

TREBLE FREQUENCIES

The treble is refined and perfectly balanced with the low end. Sennheiser does a very good job of making a treble response that isn’t too sharp or harsh, but still stays detailed and clear for precise, analytical listening. The treble in the HDB 630 is no exception, with bright coloration and excellently placed detail to give space to the ultra-highs. It’s easy for Bluetooth headphones to sound compressed or caged in when it comes to the treble, but the HDB 630 avoids that completely. There is space for frequencies to ring out naturally and get cut off far after they’ve reached their peak. The treble has power that matches that of the bass, so it comes right behind the midrange to accentuate those melodies and not get lost in the back of the mix. Having this energetic top end really rounds out the whole signature of the HDB 630 to give you an entertaining and balanced listening experience. 

When we look at the HDB 630 in comparison to other headphones, there are a lot of elements we could talk about. How does this headphone compare to its predecessor, the MOMENTUM 4? Does this headphone replace the hi-fi Focal Bathys? Could this be an end-game Bluetooth headphone? These were all questions I had during my testing. 

Simply put, the HDB 630 is a clear upgrade. If you have the MOMENTUM 4 or the Sony WH-1000XM6, I would strongly encourage making this your next upgrade. Its immersive sound signature, paired with the extravagant features and accessories, makes this a clear step up from your everyday pair of cans. The value this headphone offers is second to none. The sound out of the box requires no adjustment to my ears, and even if you want to make some tweaks, the Sennheiser app makes it more than easy to get to the sound you want. 

Is the HDB 630 an end-game headphone? My thoughts are no. Headphones like the Bowers & Wilkins Px8 S2 or the Dali IO-12 offer more flagship and endgame qualities, but the HDB 630 is definitely a good contender for those picky listeners who need detailed control over their listening. The HDB 630 stands as a direct competitor to something like the Focal Bathys, where the same price point gives you similar features and sound quality. That comparison may depend on your specific preferences in sound and features, so it is well worth giving those a side-by-side listen for a full comparison. Be on the lookout for the Bathys vs HDB 630 review!

The Sennheiser HDB 630 has delivered sound, style, and special features that give other headphones a run for their money. A lightweight build paired with excellent, audiophile-grade features and stunning sound quality makes the HDB 630 one of the best Bluetooth headphones of 2025. It arrives just in time for the holidays, where I am sure this will be a hit with anyone looking to upgrade or finally invest in a good pair of Bluetooth headphones. Sennheiser has truly outdone itself, and the HDB 630 is proof that great things come to those who wait. 

The Sennheiser HDB 630 is available today at Audio46.