Sennheiser HDB 630 Review: Comfort and Sound Done Right

Sennheiser HDB 630 Review: Comfort First, Sound That Grows on You

Some headphones arrive quietly, then slowly take over comment sections and recommendation lists. That is exactly what has happened with the Sennheiser HDB 630. These sit in a slightly strange spot. They are not officially called Momentum 5, yet everything about them suggests they are the next step forward from the Momentum 4. Even the box hints at something bigger by calling them wireless audiophile headphones, a label Sennheiser did not use before.

That choice alone raises expectations. Are these really better than what came before. Do they justify the price. And the big question people keep asking, are they good enough to challenge premium rivals like the Bowers and Wilkins PX8 S2.

Let’s slow down and walk through what actually matters.

Sennheiser HDB 630 first impressions and what you get

Straight out of the box, the Sennheiser HDB 630 feels familiar. Very familiar. The design is almost identical to the Momentum 4. Plastic build all around, same general shape, same understated look. The main visual change is depth. The ear cups are slightly thicker, which makes the headphones stick out more on the head. That is more noticeable if you keep your hair short.

Color options are limited too. At the time of writing, only black is available. Nothing bold, nothing playful. It looks fine, just a bit plain. For the price, some might expect more of a wow moment.

Inside the box is something interesting though. Along with the cables and case, there is a small Bluetooth adapter called the BTD 700. More on that later, because it plays a bigger role than it first appears.

Sennheiser HDB 630 comfort does the heavy lifting

Design opinions aside, comfort is where these headphones immediately win people over. The padding feels soft without being flimsy. Clamp force is well judged. Long sessions do not cause pressure hotspots. These are the kind of headphones that disappear after a while, and that is not an exaggeration.

The deeper ear cups help here. Ears have more room, which reduces fatigue. For people who wear headphones for hours while working, traveling, or just zoning out with music, this matters more than flashy materials.

If comfort is the top priority, many other complaints become easier to ignore.

Sennheiser HDB 630 case and controls frustrations

There are two recurring annoyances carried over from the Momentum 4. The first is the case. It is great in build quality but unnecessarily large. The headphones only fold flat, not inward, so the case stays bulky. Carrying it in a backpack is fine. Carrying it in a smaller bag quickly becomes irritating.

The second issue is the controls. There is only one physical button, used for power and Bluetooth pairing. Everything else is touch based. Play, pause, volume, and noise cancelling adjustments all rely on gestures.

In theory, this sounds clean. In daily use, it can be messy. Accidental taps happen often when adjusting the fit. Noise cancelling is controlled by pinch gestures with different levels instead of a simple on or off. It works, but it feels overcomplicated.

None of this breaks the experience, but it does add small friction points.

Sennheiser HDB 630 specs that actually matter

On paper, the Sennheiser HDB 630 checks most of the right boxes.

• 42 mm dynamic drivers
• Bluetooth 5.2 with multipoint connectivity
• SBC, AAC, and aptX Adaptive codec support
• Up to 60 hours battery life
• 10 minute quick charge for around 7 hours playback
• Weight: 311 grams

These numbers alone do not tell the full story, but they create a solid foundation.

Sennheiser HDB 630 sound quality out of the box

This is where things get interesting.

Without touching any EQ settings and using standard Bluetooth, the sound is rich and open. The soundstage feels wide for closed back wireless headphones. High frequencies are clear without being sharp. The mid range is forward in a good way. Vocals sit nicely, guitars have texture, and nothing feels buried.

Bass has weight. Not bloated, not loose. When a track calls for impact, it delivers. That low end presence adds emotion rather than noise.

Overall, this is one of the best tuned wireless headphones in its category. It sounds confident and full, even before any tweaking.

Sennheiser HDB 630 EQ options for real control

For those who enjoy fine tuning sound, Sennheiser went further than usual here.

There is a standard five band EQ for quick changes. On top of that, there is a full parametric EQ. That means precise control over frequencies from deep bass to high treble. Q factor adjustments, filters, and even A B testing are included.

This level of control is rare in noise cancelling headphones. It allows listeners to shape the sound exactly how they want. Whether that means more warmth, less treble, or a flatter profile, it is all possible.

This is where the audiophile label starts to make sense.

Sennheiser HDB 630 Bluetooth dongle explained

The included BTD 700 Bluetooth dongle is not just an extra. It is a core part of the experience.

Many phones, especially iPhones, are limited to AAC over Bluetooth. While AAC is decent, it is still compressed. Plugging in the dongle allows the headphones to receive audio using aptX Adaptive instead.

The result is subtle but real. Tracks sound slightly wider and cleaner. Instruments separate better. Compression artifacts are reduced. It is not a night and day change, but on good recordings, the difference can be heard.

This feature alone sets the Sennheiser HDB 630 apart from most competitors.

Sennheiser HDB 630 noise cancelling and transparency

Active noise cancelling is very strong here. It sits close to the top tier, nearly matching Sony’s latest models. Low frequency noise disappears easily, and constant background sounds fade away nicely.

Transparency mode, however, is weaker. Voices sound muffled. The world feels filtered instead of open. Phone calls still work fine, but hearing your own voice naturally is harder than on some rivals.

It is a compromise, not a deal breaker, but worth noting.

Sennheiser HDB 630 vs Momentum 4 vs PX8 S2

Sennheiser HDB 630 final thoughts

The Sennheiser HDB 630 is not perfect. The name is awkward. The case is great in size. Touch controls remain annoying. Transparency mode lags behind the best.

But the comfort is outstanding. The sound quality is excellent. Noise cancelling is strong. The included dongle adds real value. And the price undercuts some premium competitors.

For listeners who care about sound and comfort more than flashy design, this is an easy recommendation. Especially for iPhone users who want better wireless audio without cables.

These may not look exciting at first glance, but spend time with them, and they grow on you fast. Sometimes that is what really counts.