HEDDphone® D1

The first of its kind. Precision without compromise.

The HEDDphone® D1 delivers the clarity, realism, and tonal integrity of a reference monitor in a headphone built for true listening.

Every note feels balanced and immediate, revealing detail without fatigue, while the carefully engineered fit ensures lasting comfort for extended sessions.

At its core lies the world’s first Thin-Ply Carbon Diaphragm (TPCD) — a breakthrough that redefines what dynamic headphones can achieve.

Sparked by an idea eight years ago and refined through years of experimentation, the D1 is the result of HEDD’s four decades of acoustic expertise and its collaboration with Composite Sound of Sweden, specialists in advanced audio diaphragms.

Built on precision, purpose, and material integrity, the D1 delivers reference-grade accuracy and balance — made for those who are serious about sound.

Key Features

Thin-Ply Carbon Diaphragm (TPCD)

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.

Reimagining Dynamic Drivers

Dynamic headphones have long balanced compromises — speed versus stability, weight versus comfort.

Drawing on four decades of studio experience, HEDD re-engineered the core of the driver itself.

The result is a design that delivers studio-grade precision for personal listening — detailed, balanced, and fatigue-free.

Lightweight Comfort, Long Listening

Weighing 350 g, the D1 combines an ultra-light diaphragm with a compact driver architecture for hours of immersive, fatigue-free listening.

Every element has been engineered for stability, fit, and a natural sense of ease.

Universal Performance

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

Made in Germany

Each HEDDphone® D1 is made in Germany and fully serviceable, reflecting HEDD’s belief that great headphones should endure.

Every component is built for precision, longevity, and confidence in everyday use.

Specifications

Design

Open-back over-ear headphone

Drivers

Dynamic with a Thin-ply Carbon Diaphragm

Frequency Range

5 Hz - 40 kHz

Sensitivity

100dB at 1mW

Maximum SPL

Impedance

32 Ω

Inputs

2x 3.5mm

Cable

Textile-covered premium cable

Pads:

Perforated Velour

Net Weight

350 g

Components

1x HEDDphone® D1

2x 3.5mm Cable

1x Carry Case

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