SENNHEISER HDB 630

The HDB 630 are closed-back headphones that combine traditional high-fidelity sound with the freedom of wireless listening. With the included USB-C Bluetooth® BTD 700 dongle, users can enjoy high-resolution audio anywhere without compromising on quality, taking full advantage of aptX™ HD and aptX™ Adaptive compatibility. Every component is designed to work in harmony, revealing musical details that were previously inaccessible with conventional wireless headphones.

The 42 mm transducer developed by Sennheiser delivers a neutral sound with realistic mids and stunning detail, while the wide soundstage immerses the listener directly among the musicians. The internal design, from the acoustic mesh to the rear volume of the earcups, ensures a natural balance between mids and highs, creating an immersive listening experience without sacrificing clarity. The integrated electronics keep the music intact from source to ear, allowing also for USB-C or analog input connections up to 24 bit/96 kHz for lossless playback.

Adaptive noise cancellation blocks distractions without affecting dynamics or balance, while transparency mode lets you perceive your surroundings when needed. The parametric equalizer, accessible via the Smart Control Plus app, offers full control over the sound, enabling precise frequency shaping, bass and vocal adjustments, and highly personalized listening. The crossfeed function further enhances the naturalness of the music by balancing instruments and channels to recreate the experience of a full stereo system.

The design prioritizes comfort for extended listening sessions: generously sized earcups with luxurious padding, a headband covered in Japanese synthetic leather, lightweight construction, and gentle clamping force ensure comfort even during long use. The battery lasts up to 60 hours, allowing for days of uninterrupted music, podcast, or video playback.

The tuning emphasizes balance and neutrality. The bass is deep yet controlled, the mids fluid and realistic, and the highs airy without harshness, offering an open and natural soundstage. The HDB 630 supports critical listening without fatigue, delivering detailed and neutral reproduction that highlights every instrument and voice. This makes the HDB 630 a versatile and complete headphone, ideal for those seeking a combination of comfort, durability, advanced technology, and audiophile-grade sound in any situation.

Technical specifications:

• Audio cable: 1.20 m with 3.5 mm plug, detachable, right side
• USB cable: 1.20 m C-C connection
• Ear coupling: Over-ear
• Ear pad material: Synthetic leather
• Resolution: Up to 24 bit / 96 kHz via USB-C; analog input; Bluetooth® USB-C BTD 700 dongle
• Connectivity: Bluetooth 5.2
• Supported codecs: aptX™ Adaptive; aptX™ HD; aptX™; AAC; SBC
• Frequency response: USB: 6 Hz – 40 kHz (only with Line-In, USB 96 kHz, or Bluetooth with aptX Adaptive 96 kHz); 6 Hz – 22 kHz otherwise
• Nominal impedance: Active 480 Ω
• Sound pressure level (SPL): 105 dB (1 kHz / 0 dBFS)
• THD, total harmonic distortion: <0.2 % (1 kHz / 100 dB SPL)
• Acoustic design: Closed-back
• Transducer: Dynamic (moving coil)
• Weight: 311 g without cable