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    • HEDD Audio HEDDphone D1 Open-Back Headphones



    WIRED HEADPHONE

    Open-Back

    over-ear

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    HEDD Audio HEDDphone D1 Open-Back Headphones
    HEDD Audio HEDDphone D1 Open-Back Headphones
    HEDD Audio HEDDphone D1 Open-Back Headphones
    HEDD Audio HEDDphone D1 Open-Back Headphones
    HEDD Audio HEDDphone D1 Open-Back Headphones
    HEDD Audio HEDDphone D1 Open-Back Headphones

    SKU: HEDDphone D1

    $799.00 Sale

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        limited HEDD manufacturer warranty

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    Product Details

    ↓ Details provided by HEDD ↓
    (Specifications and appearance of this product are subject to change without notice)

    The first of its kind. Precision without compromise.

    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.

    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.

    TPCD Unit in the D1

    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.
    D1 being made

    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.
    HEDD's Berlin office
    "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

    HEDDphone® D1 Measurements

    The following graph shows the frequency response for the HEDDphone® D1 using two different simulators.

    D1 Measurements
    The Sound of the HEDDphone® D1


    Clarity and Balance

    The D1’s TPCD driver delivers a new level of sonic clarity and tonal accuracy, revealing detail and realism that are rare among dynamic headphones. It bridges the intimacy of headphone listening with the precision of studio monitors.

    Comfort and Immersion

    Thanks to the diaphragm’s low mass and compact architecture, the driver remains light and responsive, enabling long, fatigue-free sessions and a natural sense of immersion.

    Compatibility and Scalability

    With 32 Ω impedance and 100 dB sensitivity, the D1 connects easily to most playback devices, while its performance scales gracefully with premium amplification.

    Hero shot of D1

    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

    Specifications

    -Design: Open-back over ear headphone

    -Drivers: Dynamic with a Thin-ply Carbon Diaphragm

    -Frequency Range: 5Hz-40Hz

    -Maximum SPL: 100dB at 1mW

    -Impedance: Open-back over ear headphone

    -Design: 32 Ω

    -Pads: Perforated Velour

    -Cable: Textile-covered premium cable

    -Inputs: 2 x 3.5mm

    -Weight: 350g

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