Hedd HEDDphone D1
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Hedd
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A New Chapter in HEDD's Legacy: Carbon Technology Serving Headphones
With the HEDDphone D1, HEDD Audio transfers over 40 years of acoustic expertise, carried by the design heritage of Klaus Heinz, into a next-generation dynamic headphone. Its uniqueness lies in the use of a rare material in audio, Thin-Ply Carbon, already proven in extreme environments, to optimize stiffness, mass, and resonance control. The D1 was co-developed with Composite Sound (Sweden), specialists in ultra-light and highly rigid composites, aiming for coherent, modern, and durable sound reproduction.
Who Is the HEDDphone D1 For and What Are Its Best Uses?
The D1 is designed for producers, sound engineers, and musicians seeking reference-grade headphone listening while maintaining a spatial feel close to monitoring. Its open architecture highlights stage depth and element localization, useful for adjusting reverbs, panning, balances, and micro-dynamics. Thanks to accessible impedance and good sensitivity, it integrates well with both audio interfaces and high-end headphone amplifiers, delivering sound that gains solidity and nuance as the signal chain quality improves.
TPCD Diaphragm, Custom Driver, and Open Design: The Recipe for Speed and Accuracy
TPCD: Clean Transients and Resonance Control
The Thin-Ply Carbon Diaphragm (TPCD) is designed to optimize structural resonance control. In listening, this translates to sharp attacks, fine texture rendering (strings, vocals, percussion), and a sense of cleanliness in dense passages, without unnecessarily hardening the high frequencies.
Custom Dynamic Driver: Precision, Speed, Tonal Balance
The D1 features a custom dynamic driver developed with Composite Sound, targeting a rarely combined set of qualities: speed, tonal balance, and image stability. The result is a headphone suited for critical decision-making (EQ, compression, de-essing) while remaining comfortable over long periods.
Studio-Designed Connectivity: Detachable, Robust, Ready to Work
The dual 3.5 mm mono input connectors and two detachable textile-sleeved cables facilitate integration in studio environments and maintenance. The package is completed with a 6.35 mm adapter and a dedicated carrying case.
Technical specifications
| Format | circumaural |
| Power handling | 1 MILLIWATT |
| Design | open |
| Impedance | 32 Ω |
| Frequency response | 5 Hz - 40 kHz |
| Color | Black |
| Type | open-back circumaural headphones |
| Diaphragm Technology | Thin-Ply Carbon Diaphragm (TPCD) |
| Transducer | custom dynamic driver co-developed with Composite Sound (Sweden) |
| Sensitivity | 100 dB |
| Weight | 350 g |
| Headphone Connectors | dual 3.5 mm mono |
| Cables | 2 premium detachable textile-sleeved cables |
| Adapter | 6.35 mm |
| Accessory | dedicated carrying case |
Questions frequently asked
Is the HEDD HEDDphone D1 suitable for mixing and mastering?
Its open design and stable imaging facilitate control over panning, reverb, and balance. The TPCD diaphragm targets fast transients, useful for editing and EQ or compression adjustments. Its frequency response is rated from 5 Hz to 40 kHz.
Open-back HEDDphone D1: what level of sound isolation?
The open design prioritizes soundstage depth and element localization but is not intended to isolate from external noise.
What connectivity does the HEDDphone D1 have?
Two mono 3.5 mm inputs are provided on the headphones. Two detachable textile-sheathed cables are included, along with a 6.35 mm jack adapter. A dedicated carrying case completes the package.
Does the HEDDphone D1 work with an audio interface?
With an impedance of 32 Ω and a sensitivity of 100 dB, this headphone can be integrated with an audio interface. A higher-level headphone amplifier can offer more headroom and nuance depending on the setup.
Is the HEDDphone D1 comfortable for long sessions?
The open circumaural design and weight of 350 g are engineered to reduce fatigue during extended sessions. Manufactured in Germany, it features fully repairable construction and a 5-year warranty.
