HEDD Audio

HEDD Audio HEDDphone D1 Headphones

$799
$799 $799.00
The HEDD Audio HEDDphone D1 headphones, shown in black with cushioned ear pads and a padded headband against a white background, feature a sleek design, visible HEDD Audio branding, and Thin-Ply Carbon Diaphragm technology.
  • The HEDD Audio HEDDphone D1 headphones, shown in black with cushioned ear pads and a padded headband against a white background, feature a sleek design, visible HEDD Audio branding, and Thin-Ply Carbon Diaphragm technology.
  • A pair of HEDD Audio HEDDphone D1 headphones with mesh ear cups and a Thin-Ply Carbon Diaphragm rest on a dark surface near a wooden turntable and audio amplifier, connected to the equipment.
  • A pair of black HEDD Audio HEDDphone D1 headphones is connected to a black Rotel audio amplifier on a dark surface, with the green-lit volume indicator showing 35.
  • A pair of HEDD Audio HEDDphone D1 over-ear headphones and a coiled audio cable are arranged inside an open hard-shell carrying case with a molded interior, viewed from above on a white background.
  • A pair of black HEDD Audio HEDDphone D1 over-ear headphones with cushioned ear pads, padded headband, mesh-design ear cups, Thin-Ply Carbon Diaphragm, and "L" and "R" labels, displayed on a white background.
  • The HEDD Audio HEDDphone D1 headphones by HEDD Audio are black over-ear headphones with dynamic drivers, padded ear cups, an adjustable cushioned headband, and Thin-Ply Carbon Diaphragm technology, shown against a white background.
  • Top-down view of a single HEDD Audio HEDDphone D1 headphone, black with a perforated ear cup, matte finish, padded headband, visible HEDD logo on the hinge, and Thin-Ply Carbon Diaphragm for superior sound.
  • A black, semi-rigid zippered case with a molded exterior—ideal for carrying your HEDD Audio HEDDphone D1 headphones—stands upright on a white background.
  • The HEDD Audio HEDDphone D1 headphones, shown in black with cushioned ear pads and a padded headband against a white background, feature a sleek design, visible HEDD Audio branding, and Thin-Ply Carbon Diaphragm technology.
  • A pair of HEDD Audio HEDDphone D1 headphones with mesh ear cups and a Thin-Ply Carbon Diaphragm rest on a dark surface near a wooden turntable and audio amplifier, connected to the equipment.
  • A pair of black HEDD Audio HEDDphone D1 headphones is connected to a black Rotel audio amplifier on a dark surface, with the green-lit volume indicator showing 35.
  • A pair of HEDD Audio HEDDphone D1 over-ear headphones and a coiled audio cable are arranged inside an open hard-shell carrying case with a molded interior, viewed from above on a white background.
  • A pair of black HEDD Audio HEDDphone D1 over-ear headphones with cushioned ear pads, padded headband, mesh-design ear cups, Thin-Ply Carbon Diaphragm, and "L" and "R" labels, displayed on a white background.
  • The HEDD Audio HEDDphone D1 headphones by HEDD Audio are black over-ear headphones with dynamic drivers, padded ear cups, an adjustable cushioned headband, and Thin-Ply Carbon Diaphragm technology, shown against a white background.
  • Top-down view of a single HEDD Audio HEDDphone D1 headphone, black with a perforated ear cup, matte finish, padded headband, visible HEDD logo on the hinge, and Thin-Ply Carbon Diaphragm for superior sound.
  • A black, semi-rigid zippered case with a molded exterior—ideal for carrying your HEDD Audio HEDDphone D1 headphones—stands upright on a white background.
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HEDD Audio

HEDD Audio HEDDphone D1 Headphones

HEDD Audio HEDDphone D1 Headphones

$799
$799 $799.00

The best headphone release of 2025

Cup style
Open-back headphone designs are often higher-performance but have poor noise isolation and leak sound. Closed-back designs provide better noise isolation and leak less sound.

Open-Back

Wearing style
Over-ear headphones sit over your ear and surround your ear with a ring of padding. On-ear headphones are padded but rest on top of your ear. In-ear monitors are worn inside your ear canal.

Over-ear

Driver type
Speakers and headphones use a device called a 'driver' to create sound. Different types of drivers have different strengths and weaknesses, but can all produce great sound. Common varieties include dynamic, planar magnetic, and electrostatic.

Dynamic

Amp required
Some headphones require the power of an amplifier to reach comfortable listening volumes.

Yes

Connectivity
Connectivity refers to the method in which the headphones connect to the audio source. Headphones can be either wired or wireless.

Wired

Portability
DACs and amplifiers can either be carried around or meant for static desktop use

Not Portable

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Description

The first of its kind. Precision without compromise.

The HEDD Audio HEDDphone D1 represents a major step forward in headphone design. It is the first dynamic driver headphone to use Thin-Ply Carbon Diaphragm (TPCD) technology, combining advanced material science with more than 40 years of HEDD’s acoustic engineering expertise. The result is a headphone that delivers the clarity, realism, and tonal integrity of a reference studio monitor in a form built for pure, fatigue-free listening.

Redefining the Dynamic Driver

Dynamic drivers have always involved trade-offs such as speed versus stability and weight versus comfort. The D1 changes that equation. By re-engineering the diaphragm itself, HEDD has created a transducer that offers studio-grade precision along with the warmth and intimacy of a truly great headphone. Every element, from the ultra-light diaphragm to the compact driver structure, is tuned for balance, control, and natural dynamics.

Thin-Ply Carbon Diaphragm (TPCD)

At the center of the D1 is a new material called Thin-Ply Carbon. Used in Formula 1 cars and NASA’s Mars helicopter "Ingenuity," this composite provides exceptional stiffness and low mass. In the D1 it becomes the Thin-Ply Carbon Diaphragm, a driver membrane that controls resonances structurally and removes the need for traditional damping. The result is faster, cleaner, and more accurate sound reproduction across the entire frequency range.

Natural Innovation

Just as HEDD’s Air Motion Transformer redefined what was possible in studio monitoring, the D1 brings that same level of innovation to dynamic driver design. It is built not just for technical precision, but also for musical connection, delivering realistic and emotionally engaging sound that keeps you listening.

Lightweight Comfort for Long Listening

Weighing only 350 grams, the D1 combines an ultra-light diaphragm with a refined driver structure and perforated velour pads for exceptional comfort. Its open-back design and balanced sound make it ideal for long sessions in the studio or at home.

Universal Performance

With a 32 ohm impedance and 100 dB sensitivity, the HEDDphone D1 works well with a wide range of sources. It performs well with modern DAC and amp setups or portable players, while also scaling with high-end desktop systems.

Made in Germany, Built to Last

Each D1 is handmade in Germany using components from HEDD’s partners at Composite Sound of Sweden. All parts are fully serviceable and backed by an industry-leading five-year warranty. This is a headphone designed for long-term reliability and lasting performance.

Key Features

  • First dynamic driver headphone with Thin-Ply Carbon Diaphragm (TPCD) technology.
  • Studio-grade precision and tonal balance inspired by HEDD’s Air Motion Transformer monitors.
  • Lightweight 350 gram design with perforated velour pads for all-day comfort.
  • 32 ohm impedance and 100 dB sensitivity for excellent source compatibility.
  • Handmade in Germany using components from Composite Sound in Sweden.
  • Fully serviceable design with a five-year warranty.

Technical Specifications

Specification Details
Design Open-back, over-ear
Driver Type Dynamic with Thin-Ply Carbon Diaphragm (TPCD)
Frequency Response 5 Hz to 40 kHz
Sensitivity 100 dB at 1 mW
Impedance 32 ohms
Inputs Dual 3.5 mm
Cable Textile-covered premium cable
Ear Pads Perforated velour
Weight 350 grams
Warranty Five years
Included Accessories Two 3.5 mm textile-covered cables, 6.35 mm adapter, carry case
MSRP $799 USD / €699 EUR

What’s in the Box

  • HEDDphone D1 headphones
  • Two 3.5 mm premium textile-covered cables
  • 6.35 mm adapter
  • Custom carry case
  • User documentation

About HEDD Audio

Founded in Berlin by physicist Klaus Heinz and musicologist Dr. Frederik Knop, HEDD Audio (Heinz Electrodynamic Designs) combines decades of studio monitoring experience with a focus on material innovation and long-term serviceability. Each HEDDphone is built in Germany to exacting standards and designed to deliver reference-grade precision for both professional and high-fidelity listening.

Frequently Asked Questions

What makes the HEDDphone D1 different from other dynamic headphones?

The D1 is the first headphone to use a Thin-Ply Carbon Diaphragm (TPCD). This material provides exceptional stiffness and low mass, allowing the driver to reproduce sound with very low distortion and no need for traditional damping. It delivers the clarity and precision of a studio monitor while keeping the natural tone and warmth of a dynamic design.

Is the D1 hard to drive?

No. The D1 has a 32 ohm impedance and 100 dB sensitivity, so it performs well with most DACs and amplifiers. It can be used with portable players or compact desktop sources but will scale with higher-end amplification.

How comfortable is the D1 for long sessions?

The D1 weighs 350 grams and features a lightweight driver structure with perforated velour pads. Its open-back design and balanced clamping force make it suitable for extended listening without fatigue. This is HEDD's comfiest headphone to date!

HEDD is known for their AMT drivers. Does the D1 use AMT?

The D1 is a dynamic headphone that uses a Thin-Ply Carbon Diaphragm. Although it is not AMT, its response speed and resolution are comparable to AMT designs thanks to the stiffness and precision of the TPCD driver.

Where is the HEDDphone D1 made?

Every D1 is handmade in Germany. The diaphragm material is produced by Composite Sound in Sweden, and each headphone is assembled and tested in HEDD’s Berlin facility.

Is the D1 serviceable?

Yes. All components of the D1 are replaceable or serviceable through HEDD Audio. This approach ensures long-term durability and reduces waste.

What is the warranty period for the D1?

The HEDDphone D1 comes with a five-year limited warranty, one of the longest in the industry for high-end headphones.

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