Reasons to Buy

• Sennheiser HDB 630 offers clean, neutral sound with studio-grade accuracy
• Full Parametric EQ for precise sound control
• Excellent battery life rated at up to 60 hours
• Hi-res support through aptX Adaptive, aptX HD, USB-C, and analog
• Comfortable and lightweight design for long listening
• Bundled BTD 700 dongle boosts hi-res compatibility

Every few years, a pair of wireless headphones arrives that tries to reset expectations — not with flashy gimmicks, but with a clear purpose. Sennheiser HDB 630, priced at ₹44,990, feels like one of those rare attempts. I started testing them with the usual mix of curiosity and doubt. After all, the premium ANC segment already moves fast, and most brands chase louder bass, bigger features, and smarter apps. Yet this headphone takes a different route. It leans on refinement over fireworks, clarity over colour, and control over shortcuts. And somewhere between the long listening sessions, train rides, and work calls, the Sennheiser HDB 630 began to reveal its intent. It wants to prove that wireless headphones can be both convenient and genuinely audiophile-friendly — without trapping you in technical complexity or fatigue. That ambition alone sets the tone for this review.

Design that favours comfort and clarity

Sennheiser stays minimalist here, yet the design looks refined. The earcups are smaller than the Momentum 4, making them compact for daily use. The Ideatex™ protein-leatherette pads feel smooth and soft. The clamping force sits in a comfortable middle zone. It seals bass well without creating pressure points.

The weight balance across the headband and earcups feels even. The Japanese leatherette wrap adds a premium touch and stays breathable during long sessions. This design leans towards studio-style ergonomics rather than flashy consumer style. It looks understated, yet it feels well built and effortless during long listening hours.

Controls built for real sound shaping

Sennheiser HDB 630 offers the biggest control upgrade Sennheiser has delivered in a wireless headset. The Smart Control Plus app brings a full Parametric Equalizer. This is not a typical 5-band slider system. Instead, you can tune exact frequencies, set filter types, adjust the bandwidth, and shape the sound with real precision.

This tool places it ahead of Sony’s WH-1000XM6 for people who tweak their sound often. You also get Crossfeed, inspired by Sennheiser’s HE 1. It blends channels gently and gives hard-panned tracks a more natural stereo feel. This helps older mixes especially, as they gain better coherence.

The app also handles ANC modes, sound profiles, and firmware updates. Everything works smoothly, and nothing feels hidden behind menus. The whole system feels clean and practical.

Connectivity that pushes hi-res listening forward

Sennheiser HDB 630 supports aptX Adaptive and aptX HD for wireless hi-res audio. The stability stays consistent even in crowded spaces. You can also use USB-C for 24-bit/96 kHz playback. A 3.5 mm cable is included for analog users.

However, the real highlight is the BTD 700 Bluetooth dongle. Only a small share of laptops and smartphones fully support hi-res wireless codecs. Once you plug in the dongle, compatibility improves significantly. In daily use, sound gains more detail. Spatial cues and micro-textures feel clearer. The dongle helps the HDB 630 deliver a more consistent audiophile-grade output across devices.

ANC is strong, yet balanced. It removes external noise without adding pressure or disturbing the tonal balance. Transparency mode sounds natural and does not distort voices. The Crossfeed tool also works well with hi-res connectivity, giving a more speaker-like feel.

Sound quality that focuses on truth, not tricks

The HDB 630 makes its biggest impression in sound quality. The new transducer uses an improved magnet mesh and controlled back volume. The result is a clean and neutral sound signature. This tuning avoids the heavy bass and warm tilt found in many consumer headphones.

The bass is fast and tight. It extends deep without adding thump. The mids sound natural and very clear. Vocals and acoustic instruments have presence, yet they stay uncoloured. The slightly raised upper mids add intimacy without harshness.

The treble feels airy, smooth, and open. There is a gentle lift before 10 kHz, giving more space and detail. The soundstage feels wide for a closed-back headphone. Layers remain separated even in complex tracks.

With USB-C, the sound gains depth. With the dongle, spatial details become sharper. Across genres, the headphone stays accurate and fatigue-free. It leans towards realism, not fun, and this is deliberate.

Clear calls but limited by Bluetooth

The call quality is dependable. Voices sound clear, and ANC switches smoothly. Latency stays low with the dongle, making it better for gaming and calls.

However, Bluetooth’s Hands Free mode still limits bandwidth during calls. The audio quality drops when the microphone activates. This is a common constraint, but it feels more noticeable here due to the headphone’s high sonic capability. You must choose to focus on calls or music, not both at the same time.

Battery life that boosts everyday use

Battery life is one of the biggest strengths. Sennheiser claims up to 60 hours. After several days of use, the battery still sat above 50 percent. A 10-minute charge adds around seven hours, making it great for travel.

The HDB 630 beats Sony’s WH-1000XM6 in battery efficiency. Combined with the lightweight design, this becomes an all-day headphone without worry.

Verdict: A powerful wireless upgrade for people who value accuracy

The Sennheiser HDB 630 enters a segment filled with feature-rich ANC headphones. Yet, its approach stands separate. Sony’s WH-1000XM6 still leads in smart features and ANC aggression. But Sennheiser aims for purity, neutrality, and control.

If you want customisation, multi-path listening, and accurate sound, this headphone outshines the Momentum 4 and edges past Sony in clarity and control. It does not replace wired open-backs, and it is not designed to. Instead, it builds one of the strongest cases for wireless audiophile listening today.