• The HEDDphone D1 on a white background
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  • HEDDphone D1 on a dark background
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HEDDphone® D1

The first of its kind. Precision without compromise.

€699
€699
Inc. taxes
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A new HEDDphone® built for true listening, the D1 delivers the clarity, realism, and tonal integrity of a reference monitor. Every note feels balanced and immediate, details are revealed without fatigue, and the carefully engineered fit ensures lasting comfort for extended sessions.

The D1 is the world’s first dynamic headphone with a Thin-Ply Carbon Diaphragm (TPCD). Developed with Swedish company Composite Sound, specialists in advanced audio diaphragms, the D1 combines HEDD’s 40 years of acoustic expertise with advanced material science.

Built with precision, purpose, and material integrity, the HEDDphone® D1 delivers reference-grade accuracy and balance. Made for those who are serious about sound.

Features

  • Thin-Ply Carbon Diaphragm engineered for structural resonance control
  • Ultra-fast and clean transients
  • Custom dynamic driver tuned for precision, speed, and tonal balance
  • Open-back circumaural design delivers natural openness and spacious soundstage
  • Broad source compatibility, scales with premium amps
  • Lightweight and comfortable, perfect for extended listening sessions
  • Includes dual 3.5 mm mono connectors; 6.35 mm adapter; and 2 premium textile-covered detachable cables
  • Custom carry case
  • Made in Germany
  • 5 year warranty after registration

Specification

Design
Open-back over-ear headphone
Drivers
Dynamic with a Thin-ply Carbon Diaphragm
Frequency Range
5 Hz - 40 kHz
Maximum SPL
100dB at 1mW
Impedance
32 Ω
Pads
Perforated Velour
Cable
Textile-covered premium cable
Inputs
2 x 3.5mm
Weight
350g (net)
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Key features

  • Thin-Ply Carbon Diaphragm

    At the heart of the D1 lies a diaphragm made from Thin-Ply Carbon, an advanced composite used in extreme applications from Formula 1 cars to NASA’s Mars helicopter Ingenuity. In headphone design, it becomes something entirely new: TPCD eliminates the need for traditional damping at the diaphragm level, enabling faster, cleaner and more accurate performance.

  • Custom Dynamic Driver

    Dynamic headphones have long balanced compromises such as speed versus stability or weight versus comfort. Drawing on four decades of R&D experience, and the expertise of Composite Sound, HEDD has engineered the core of the D1 driver to deliver studio-grade precision for personal listening. The result is sound that is detailed, balanced, and fatigue-free.

  • Universal Performance

    With 32 Ω impedance and 100 dB sensitivity, the D1 performs consistently across sources from portable players to dedicated amplifiers. It also scales gracefully with higher-end systems while maintaining control and balance.

  • Designed and made in Berlin

    All HEDD products are designed and assembled in Berlin by talented engineers and craftspeople who draw from a rich history in audio reproduction to create products tuned to the key of you.
Mark Sparrow
"When it comes to sonic clarity and tonal accuracy, the HEDDphone® D1 produces the kind of sound signature that eludes most audiophiles seeking the Holy Grail of fidelity and balance."

Mark Sparrow
— Consumer Tech @ Forbes

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