The HDB 630’s tuning is all about balance: Fast and extended bass, clear lifelike mids, and controlled treble that keeps the music feeling open and natural.

The HDB 630’s curve compared to the MOMENTUM 4 shows how audiophile tuning changes the listening experience.

Notice the low end: The HDB 630’s sub-bass and mid-bass are quick and controlled, staying closer to neutral. This reduces any “masking” effects that can hide vocal detail. Moving into the lower mids, the HDB 630 remains smooth and even, keeping voices present and lifelike.

In the upper mids, there’s a tasteful lift that gives vocals a richer, more intimate presence, balanced by a still-neutral bass foundation. The treble region keeps that balance, adding a sense of air without harshness — something you can see in the rise before 10 kHz, which helps improve the perception of a natural, open space around instruments.

The result is a frequency response tuned for speed and clarity in the bass, lifelike mids, and controlled treble — all without the peaks or dips that can cause listening fatigue. It’s a more neutral, refined take on Sennheiser’s wireless sound that makes long sessions and critical listening a unique pleasure.

Turning audiophile sound on its head

Serious listening used to require a serious amount of equipment. The HDB 630 changes the rules.

A perfectly orchestrated acoustic chain

Each component has been carefully crafted to work in harmony, revealing details you’ve never heard from wireless headphones before.

Control freaks, it’s your time to shine

Critical listening demands state-of-the-art electronics and precise control. That´s why we included high-res codecs and advanced capabilities like the crossfeed feature and parametric equalizer.

Parametric equalizer: The precision to get exactly what you want

Previous equalizers only provided limited benefits, whereas our new parametric equalizer gives you full flexibility to adjust your sound exactly to your needs. The parametric equalizer available via the Smart Control Plus App lets you shape your sound exactly how you like it — down to the smallest detail.

Stay comfortable and stay connected

A great headphone should take even epic playlists in stride.