Sennheiser HDB 630 – Wireless Over-Ear Headphones

Sennheiser HDB 630 – Wireless Over-Ear Headphones

You want it all. High resolution, neutral tone, extra-long battery life, flawless active noise cancellation, and of course, no more cables. Meet the closed-back HDB 630. With the included BTD 700 Bluetooth® USB C Dongle, you're free to enjoy glorious audiophile sound anywhere you go.

• 42mm in-house transducer for audiophile sound
• Active Noise Cancellation (ANC) with Transparency Mode
• Closed-back over-ear design
• Bluetooth 5.2 with aptX™ Adaptive and aptX™ HD
• BTD 700 Bluetooth® USB C Dongle included
• USB-C and 3.5mm analog connectivity
• Up to 60 hours battery life
• Parametric equalizer via Smart Control Plus app
• 2 Year Warranty

Highlights & Key Technologies

Audiophile Sound with BTD 700 Bluetooth® USB C Dongle
The HDB 630 comes with the BTD 700 Bluetooth® USB C Dongle, unlocking high-resolution wireless sound from devices that don't natively support aptX™ HD or aptX™ Adaptive codecs. Simply connect the dongle to your smartphone, tablet, or laptop via USB-C, and enjoy brilliant aptX™ Adaptive audio streaming. The dongle essentially upgrades your device's Bluetooth capabilities, delivering hi-res quality wirelessly. No matter which codecs your device supports, the BTD 700 ensures you get the best possible wireless audio performance with your HDB 630.

Perfectly Balanced Audiophile Sound
Sennheiser's in-house 42mm transducer delivers neutral sound with lifelike mids, stunning detail, and a wide soundstage. 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. Carefully tuned, neutral, high-res sound like this requires acoustics, mechanics, materials, and electronics that complement each other perfectly. The engineering team optimized every part of the acoustic chain from the 42mm in-house transducer to the transparent mesh in the baffle to work together with exceptional balance and clarity. The deep back volume and new acoustic mesh ensure smooth upper mids and lower treble, delivering a natural and balanced sound experience typically unseen in a closed headphone.

High Resolution Audio Support
Enjoy high resolution with support for aptX™ HD and aptX™ Adaptive, especially when paired with the included BTD 700 Bluetooth® USB C Dongle. For the purest signal, connect via USB-C or analog input for lossless listening at up to 24-bit/96kHz. The HDB 630's onboard electronics keep your music pristine from source to ear. aptX™ HD and aptX™ Adaptive Bluetooth® codecs recreate high-quality content wirelessly. When you want the purest possible signal, you can also plug in via USB-C and listen to high-resolution, lossless files. Not to mention the included audio cable, which lets you plug into any 3.5mm jack for maximum compatibility.

Parametric Equalizer for Precision Control
The HDB 630's parametric equalizer available via the Smart Control Plus app lets you shape your sound exactly how you like it — down to the smallest detail. A standard graphic equalizer lets you boost or cut within preset frequency bands, but the HDB 630's parametric equalizer puts you in the driver's seat: you can set the exact frequency range you prefer, control the bandwidth to make that adjustment wide or narrow, and choose the filter type for even more precise shaping. This flexibility lets you tailor vocals to your preference, adjust brightness, or fine-tune bass — without affecting the rest of your music. It offers a level of control rarely seen in wireless headphones, perfectly complementing the audiophile tuning.

Crossfeed Feature for Classic Recordings
The crossfeed feature is great for classic tracks with hard-panned mixes. It takes instruments concentrated on one channel and balances them out, creating a much more natural listening experience — like hearing the track on a full stereo system. This feature helps create a more natural soundstage for recordings that were mixed for speakers rather than headphones.

Powerful Adaptive Noise Cancellation
Powerful adaptive noise cancellation blocks distractions without degrading clarity, dynamics, or balance. The HDB 630 features an active noise cancellation (ANC) function that allows you to reduce ambient noise to a minimum. Even when ANC is activated, your headphones' sound quality is always at its best. Continuous and low-frequency noise, such as motor or fan noise, is particularly well suppressed. The Transparency Mode optimally complements the active noise cancellation ANC, allowing you to hear ambient sounds or communicate without having to remove the headphones. Via the adjustable intensity of the Transparency Mode and the active noise cancellation ANC, you can determine how much ambient noise reaches your ears.

Exceptional Battery Life
Listen for days, not hours, with up to 60 hours of battery operation. With up to 60 hours of battery life, you can listen to music, podcasts, or videos literally for days. Go on a week-long trip, crush it in marathon work sessions, or binge videos on your tablet and never have to think about charging once. The quick charge function gives you approximately 7 hours of playback time after 10 minutes of charging.

Premium Comfort for Extended Listening
The HDB 630's earcups are generously sized with earpads that feel as luxurious as they look. The headband is wrapped in refined Japanese leatherette. Low weight (approximately 293g) and a gentle clamping force make these headphones a joy to wear, even if you're listening for hours. It's that elusive blend of long-haul performance and all-day comfort that will ensure these become your new favorite daily driver headphones. For good sound quality, the best possible noise cancellation and the best possible wearing comfort, the headband of the headphones can be adjusted to properly fit your head.

Smart Control Plus App
The Sennheiser Smart Control Plus app allows you to use all functions and settings of the headphones. Adjust the sound to your liking using the parametric equalizer, control ANC settings, manage Bluetooth connections, customize voice prompts and sound signals, activate or deactivate the touch pad function, adjust the Smart Pause function, and access firmware updates. The app provides complete control over your listening experience.

Smart Pause Function
The headphones are equipped with a sensor that automatically detects whether the headphones are worn or taken off from your ears. Music playback pauses when you take off the headphones and continues when you put them on again. A phone call is accepted when you put on the headphones. A phone call is muted when you take off the headphones during the call and resumed when you put the headphones back on.

Intuitive Touch Controls
The touch pad on the outside of the right ear cup provides intuitive gesture control. Tap to play/pause music, swipe vertically to adjust volume, swipe horizontally to skip tracks, and use pinch/stretch gestures to adjust ANC and Transparency Mode intensity. Press the multi-function button to access voice assistants, manage calls, or control power functions.

Premium Carry Case Included
The HDB 630 comes with a premium carry case to protect your headphones when not in use or during transport. When placed in the carry case, the headphones automatically switch off. The case provides excellent protection and makes it easy to travel with your headphones.

Details & Specifications

MODEL INFORMATION
Model: HDBT (HDB 630)
Series: Sennheiser Wireless Headphones
Warranty: 24-month warranty (North America, Latin America, Caribbean, Asia-Pacific); 24-month warranty (Europe, Middle East)
Article Number (SKU): 700445
Country of Origin: Designed and Engineered in Germany

ACOUSTIC DESIGN
Wearing Style: Over-ear, closed-back
Ear Coupling: Circum-aural (around-ear)
Transducer Principle: Electrodynamic (moving coil)
Transducer Size: 42mm in-house design
Acoustic Design: Closed-back

DRIVERS & AUDIO PERFORMANCE
Speaker Frequency Range: 6Hz - 40,000Hz (USB-C, analog input, or Bluetooth with aptX™ Adaptive 96kHz); 6Hz - 22,000Hz (otherwise)
Speaker Sensitivity: 105 dB SPL (1 kHz / 0 dBFS)
Speaker THD (Total Harmonic Distortion): <0.2% (1 kHz, 100 dB SPL)
Nominal Impedance (Active): 480 ohms
Resolution: Up to 24-bit / 96kHz with USB-C, analog input, or BTD 700 Bluetooth® USB C Dongle

MICROPHONE SYSTEM
Microphone Principle: MEMS
Microphone Type: 4x omnidirectional speech microphones
Microphone Configuration: 2x2-mic beamforming array
Microphone Frequency Response: 50Hz - 10,000Hz (±3 dB)
Comfort Call Function: Own voice playback during calls (adjustable via app)

ACTIVE NOISE CANCELLATION
ANC Microphones: 2x directed outwards, 2x directed inwards (per ear cup)
ANC Modes: Adaptive ANC (automatic reduction based on noise conditions), Wind Noise Reduction (Off/Auto/Max)
Transparency Mode: Adjustable intensity, optional audio playback pause at full transparency
ANC Status: Available via Bluetooth, USB-C, analog connection (battery charge required)

BLUETOOTH CONNECTIVITY
Bluetooth Version: Bluetooth 5.2, Class 1
Transmission Frequency: 2,402MHz - 2,480MHz
Modulation: GFSK, π/4 DQPSK, 8DPSK
Bluetooth Profiles: HFP (Hands-Free Profile), AVRCP (Audio/Video Remote Control Profile), A2DP (Advanced Audio Distribution Profile)
Supported Codecs: aptX™ Adaptive, aptX™ HD, aptX™, AAC, SBC
Bluetooth Range: Up to 10 meters (line of sight)
Output Power: 10mW (max)
Paired Devices Memory: Up to 6 devices
Simultaneous Connections: 2 devices (audio playback from one device at a time)
Device Name: HDB 630 (customizable via app); LE-HDB 630 (Bluetooth Low Energy only)

BTD 700 BLUETOOTH® USB C DONGLE SPECIFICATIONS
Model: BTD 700
Bluetooth Version: Bluetooth 5.4, Class 1
Transmission Frequency: Classic BDR/EDR and BLE 1M: 2,402MHz - 2,480MHz; BLE 2M: 2,404MHz - 2,478MHz (without 2,426MHz)
Modulation: GFSK, π/4 DQPSK, 8DPSK
Bluetooth Profiles: HFP, A2DP, Auracast™
Supported Codecs: Qualcomm® aptX™, Qualcomm® aptX™ Adaptive Audio, Qualcomm® aptX™ Lossless, SBC, LC3
Range: Up to 50 meters
USB Interface: USB 2.0
Power Supply: 5V⎓, 100mA
Operating Current: ≤100mA
Standby Current: <2.5mA
Dimensions (L x W x H): 23.8 x 15.2 x 7.6mm
Weight: Approximately 2.2g
Supported Host Operating Systems: Windows 10 or higher, Mac OS V11 and V12, Android 13 or higher, iPhone or iPad with USB-C
Status LED Indicators: Multiple LED colors indicating connection status, codec in use, and operational modes
Pairing Memory: Saves last paired headphones

BATTERY & CHARGING
Battery Type: Built-in rechargeable lithium-polymer battery
Battery Capacity: 3.7V⎓, 700mAh, 2.59Wh
Operating Time: Up to 60 hours (music playback via Bluetooth with ANC activated)
Charging Time: Approximately 2 hours (complete charge cycle)
Quick Charge: Approximately 7 hours playback after 10 minutes charging
Charging Interface: USB-C socket
Charging Input: 5V⎓, 750mA max
USB Cable Included: 1.2m USB-C to USB-C cable
Battery Status Indicators: 5-level LED display, voice prompts, app display
Charging Compatibility: Standard USB power supply recommended (max 20V or 60W)

CONNECTIONS & CABLES
USB Connection: USB-C (for charging, calling, streaming via PC/Mac)
Analog Audio Input: 2.5mm jack on headphones
Audio Cable Included: 1.2m cable with 3.5mm jack plug and 2.5mm jack plug
In-Flight Adapter: Included (dual-prong aircraft adapter)
Cable Connection Behavior: Flight mode activates when analog cable connected (Bluetooth deactivated)

CONTROLS & FEATURES
Multi-Function Button: On/off, voice assistant activation, pairing, mute toggle
Touch Pad Location: Outside of right ear cup
Touch Gestures: Tap (play/pause), Double tap (pause/idle mode), Vertical swipe (volume), Horizontal swipe (track skip/rewind), Pinch (increase ANC), Stretch (increase Transparency Mode)
Voice Prompts: Connection status, battery level, volume limits, mute status, pairing status (customizable via app)
Sound Signals: Switch on/off, pairing mode, volume adjustment, call notifications, cable connection/disconnection
Smart Pause Function: Automatic play/pause based on wear detection, call management (accept/mute)
Voice Assistant Support: Siri, Google Assistant, other platform-specific assistants

PHYSICAL SPECIFICATIONS
Weight (Headphones): Approximately 293g (without cable); 311g (specification listed with cable)
Ear Pad Material: Leatherette (synthetic)
Headband Material: Japanese leatherette
Headband Adjustment: Steplessly adjustable
Ear Cup Markings: R (right) and L (left) inside ear cups
Magnetic Field Strength: 6.25mT

ENVIRONMENTAL SPECIFICATIONS
Operating Temperature: 0°C to +40°C / 32°F to 104°F
Charging Temperature: +10°C to +40°C / 50°F to 104°F
Storage Temperature: -20°C to +60°C / -4°F to +140°F
Relative Humidity (Non-Condensing) - Operation: 10% to 80%
Relative Humidity (Non-Condensing) - Storage: 10% to 90%

SMART CONTROL PLUS APP FEATURES
Parametric Equalizer: Advanced 5-band parametric EQ with adjustable frequency, bandwidth, and filter type
Crossfeed Feature: Naturalize hard-panned stereo mixes
ANC Settings: Adaptive mode, Wind Noise Reduction (Off/Auto/Max), intensity adjustment
Transparency Mode: Intensity adjustment, playback pause settings
Connection Management: View and manage paired devices, selective device deletion
Audio Mode Priority: Standard or High Resolution mode selection
Device Naming: Customize headphone name
Voice Prompts/Sounds: Enable/disable voice prompts and sound signals
Touch Pad: Enable/disable touch controls
Smart Pause: Enable/disable automatic wear detection functions
Auto Power Off: Adjustable timeout (default 15 minutes after removing headphones)
Firmware Updates: Over-the-air firmware updates for headphones
Availability: iOS (App Store) and Android (Google Play)

REGULATORY COMPLIANCE
Certifications: General Product Safety Regulation (EU) 2023/988, Sound Pressure Limits (country-specific), Battery Regulation (EU) 2023/1542, RoHS Directive (2011/65/EU), Radio Equipment Directive (2014/53/EU), UK Radio Equipment Regulations (2017), UK RoHS Directive (2012)
Safety Standards: Compliant with Bluetooth SIG, USB-IF certification recommended for cables
Disposal: WEEE Directive compliant, Battery Regulations compliant, separate disposal required

INCLUDED ACCESSORIES
HDB 630 closed-back headphones
BTD 700 Bluetooth® USB C dongle
1.2m USB-C to USB-C audio and charging cable
1.2m audio cable with 3.5mm jack plug and 2.5mm jack plug
In-flight adapter (dual-prong aircraft adapter)
Premium carrying case
Quick guide
Safety guide
Compliance sheet

REPLACEMENT PARTS AVAILABILITY
Ear Pads: Available for purchase (replacement recommended for hygiene)
Replacement Parts: Available at www.sennheiser-hearing.com/hdb-630
Warranty Service: Contact local Sonova Consumer Hearing partner
Note: Limited availability of replacement parts and repair services beyond warranty period