Sennheiser is back with a premium pair of on-the-go headphones, the HDB 630, launched in India at ₹44,990. The brand is pitching these as wireless headphones for people who want everything: high-resolution audio, a neutral tone, massive battery life, uncompromised ANC, and the freedom to ditch cables entirely. Even before the India launch, the HDB 630 had already built global buzz among audiophiles, often compared to Sony’s WH-1000XM6 in early discussions. I’ve been testing the headphone extensively, and while it might not be perfect for a few, it stands out as one of Sennheiser’s most mature wireless efforts yet.
Design
Sennheiser keeps things minimalist with the HDB 630, but the execution is striking. The smaller earcups instantly make these feel more compact than the Momentum 4, without compromising comfort. The use of refined Ideatex™ protein-leatherette across the headband and pads adds a level of sophistication you notice the moment you pick them up. The clamping force is intentionally moderated, tight enough to seal in bass, gentle enough for long sessions.
This is a design that prioritizes pure, uncoloured sound reproduction. The balance between the headband and earcups, combined with lightweight internals, gives these an ergonomic footprint similar to studio headphones. The Japanese leatherette wrap on the headband feels premium yet breathable, and during long listening days, the HDB 630 never became fatiguing. It’s an understated design, but premium in all the ways that matter.
Controls
Sennheiser has built its most significant control upgrade yet inside the HDB 630, a full Parametric Equalizer inside the Smart Control Plus app. This is not the usual 5-band EQ every consumer headphone offers. You can target exact frequencies, widen or narrow the bandwidth, choose filter types, and shape sound with the kind of precision normally reserved for desktop software.
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For someone who tweaks sound signatures frequently, this is the biggest upgrade over Sony’s WH-1000XM6. Sony gives you presets and a simple band EQ. The HDB 630 gives you something closer to mastering-grade control.
The second major tool is Crossfeed, inspired by the legendary Sennheiser HE 1. Hard-panned mixes, especially older rock, jazz, or classical, get a more natural stereo image, blending channels the way real speakers would. These controls aren’t gimmicks; they meaningfully improve the listening experience if you know how to use them.
ANC modes, sound quality settings, and firmware updates also sit inside the app. It’s a clean, functional ecosystem, but what stands out is that the HDB 630 finally gives audiophile-level control in a wireless product.
Connectivity
Sennheiser hasn’t just added codec support, it has built an entire signal chain that caters to hi-res listening. The HDB 630 supports aptX Adaptive and aptX HD, ensuring clean wireless quality with excellent stability. For wired listening, the USB-C port handles 24-bit/96 kHz playback, and you can also plug in via the included 3.5 mm cable.
What genuinely lifts the connectivity experience is the bundled BTD 700 Bluetooth USB-C dongle. Only around 16% of smartphones and laptops support high-res wireless codecs natively. With this dongle, compatibility jumps above 80%. In real-world use, this does improve transparency, instrument clarity, and micro-details, especially in acoustic tracks.
Powerful adaptive noise cancellation seals external noise without injecting pressure or altering the tonal balance. Transparency mode is clean and natural, making quick conversations effortless. Crossfeed also pairs well with wireless hi-res playback, especially when shifting between genres. Together, these features make the HDB 630 feel like a modern audiophile toolset rather than a conventional ANC headphone.
Sound Quality
This is where the HDB 630 truly justifies its existence. Sennheiser’s newly developed transducer uses an optimised magnet mesh and acoustic back volume to create a clean, controlled, and highly neutral presentation. The sound is not tuned for consumer punch. Instead, it’s built for people who want accuracy and speed.
The bass is fast, extended, and extremely controlled. There’s no unnecessary thump or mid-bass bloom like you hear on Sony’s WH-1000XM6. This restraint allows vocals and instruments to breathe without masking. The mids are natural, lifelike, and detailed, particularly vocals and acoustic instruments. The slight lift in the upper mids adds intimacy but never feels shouty.
Treble is airy yet smooth, with a tasteful rise before 10 kHz that adds a sense of space without introducing harshness. Even in a closed-back format, the soundstage feels open and layered. Compared to the Momentum 4, the HDB 630 is more neutral and refined, less “fun,” but unquestionably more accurate.
Plug them into a laptop via USB-C and high-resolution tracks gain depth and a sense of effortlessness. With the BTD 700 dongle, there’s a noticeable improvement in spatial cues and micro-details, especially on lossless streaming platforms.
This tuning is deliberate, it’s meant to minimize fatigue during long sessions and offer a balanced presentation that works across genres. For critical listening on the move, it’s one of the best wireless sound signatures I’ve heard yet.
Calls and Microphones
Call quality is solid on the HDB 630. The integrated microphones handle voice clarity well and toggle smoothly between ANC and transparency modes. For gaming and video calls, latency is impressively low, especially with the dongle.
However, there’s one crucial limitation: when the microphone activates, the headphones drop into Hands Free mode, drastically reducing audio bandwidth. This affects music quality instantly. It’s a known limitation across Bluetooth audio profiles, but on a headphone designed for audiophiles, it stands out. As long as you avoid mixing calls and music, you’ll be fine, but it’s worth knowing upfront.
Battery
Battery life is a major highlight. Sennheiser claims up to 60 hours, and in my testing, the headphones stayed above 50% even after multiple days of normal use. A 10-minute charge adds seven hours of playback, making these ideal travel headphones.
Battery efficiency is better than Sony’s WH-1000XM6 and most premium ANC headphones in this segment. Combined with the light weight and comfort, the HDB 630 easily qualifies as an all-day, everyday headphone.
Verdict
At ₹44,990, the Sennheiser HDB 630 enters a competitive space dominated by Sony’s WH-1000XM6. But the target audience is different. Sony still leads in ANC aggressiveness, smart features, and consumer-friendly tuning. But if you want precision, neutrality, control, and multiple listening pathways: USB-C, aptX HD, aptX Adaptive, analog, and a hi-res dongle, the HDB 630 is in a different league. It outperforms the Momentum 4 in sound quality and sound control and comfortably edges past Sony when it comes to customisation and high-resolution playback.
It doesn’t replace professional open-backs or high-end wired headphones and it isn’t meant to. Those serve a very different purpose. But as a wireless audiophile headphone that blends accuracy, comfort, and fine-grained control, the Sennheiser HDB 630 lands right where it should.
