The Sennheiser HDB630 features:
-Proprietary 42mm transducer and refined acoustic design delivers a neutral sound with lifelike vocals
-Enjoy high resolution with support for aptX™ HD and aptX™ Adaptive, especially when paired with the included BTD 700 Bluetooth® USB C Dongle
-Class-leading 60-hour battery life
-Parametric EQ, Adaptive ANC + Transparency mode
-Lightweight build and premium Japanese leatherette headband for fatigue-free listening

Sennheiser HDB 630 universal closed type audiophile headphones are suitable for any situation.
You want everything? High resolution, neutral tone, extremely long battery life, impeccable active noise reduction and of course wireless freedom? But at the same time, you think that sometimes it is good to listen to the valves with the maximum quality, which can only be obtained from a wired connection...? In this case, the closed type Sennheiser HDB 630 could be just for you!

With the included BTD 700 Bluetooth® USB C module (dongle), you can enjoy audiophile-level sound wherever you go. In a home situation, you can enjoy music wired and get the most out of modern high-definition sound.

Compared to the Momentum 4 drivers, the sound of the HDB 630 is cleaner, clearer and significantly more neutral and uniform. Bass frequencies are not stressed and higher frequencies are not as sharp (see also the graph of frequency response in the gallery). The overall sound image is comparable to the HD 600 series wired headphone models.

Specifications
Weight: 311 g without cable
Audio cable: 1.20 m cable with 3.5 mm plug, detachable, right side
USB cable: 1.20 m with C-to-C connection
Ear coupling: Over-ear
Ear pad material: Leatherette (synthetic)
Resolution: Up to 24 bit / 96 kHz with USB-C, analog input or BTD 700 Bluetooth® USB C Dongle
Connectivity: Bluetooth 5.2
Codec support: aptX™ Adaptive™, aptX™ HD, aptX™, AAC, SBC
Frequency response: USB: 6 Hz - 40 kHz (only when using Line-In, USB (96 kHz) or Bluetooth with aptX adaptive (96kHz), 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: Electrodynamic (moving coil)