HEDD Audio HEDDphone D1 Open-Back TPCD Dynamic Headphones

HEDDphone D1 Open-Back, Over-Ear Dynamic Headphones, with Thin-Ply Carbon Diaphragm, by HEDD Audio.

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.

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.

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 1 premium textile-covered detachable cable
• Custom carry case
• Made in Germany
• 5 year warranty after registration

Specifications

• Design: Open-back over-ear headphone
• Drivers: Dynamic, with Thin-ply Carbon Diaphragm (TPCD)
• Frequency Range: 5 Hz - 40 kHz
• Maximum SPL: 100 dB @ 1 mW
• Impedance: 32 Ω
• Pads: Perforated Velour
• Cable: TRS 3.5 mm textile-covered premium cable; 2 m long; with 6.35 mm adapter
• Inputs: 2 x 3.5 mm
• Weight: 350 g (net)

Included

• HEDDphone D1
• Detachable Cable
• 6.35mm Adapter
• Custom Carry Case
• Documentation

More Information

• HEDDphone D1, by HEDD Audio