HEDDphone D1 Open Back Headphones

Introducing the D1 The D1 is the first-ever dynamic driver headphone to use Thin-Ply Carbon Diaphragm (TPCD) technology. Sparked by an idea eight years ago to utilise Thin-Ply Carbon in headphone design, and furthered by extensive experimentation and refinement, the D1 is the result of HEDD’s 40 years of acoustic expertise, in collaboration with Composite Sound of Sweden—specialists in the design and manufacture of cutting-edge audio diaphragms. The finished product is a headphone that redefines what a dynamic driver can be. Natural innovation Just as HEDD’s Air Motion Transformer redefined what was possible in studio monitoring, theD1 brings the same spirit of innovation to the traditional dynamic driver. It is a headphone that celebrates materials, collaboration, and most importantly, sound. The D1 is HEDD’s first dynamic driver headphone. It is a true outlier, delivering sonic precision and tonal integrity. The outcome is realism and resolution rarely found in conventional dynamic headphones. D1 headphones are built on the foundations of our company’s celebrated loudspeaker and headphone design, with a revolutionary TPCD dynamic driver at its heart What is TPCD? Thin-ply carbon (TPC) is not ordinary carbon fiber. Composed of ultra-thin layers of carbon, precisely aligned and bonded, TPC is prized for its exceptional stiffness-to-density ratio, low mass, and resilience. As such, it has become the material of choice for extreme demands—from the chassis of Formula 1 cars to NASA’s Mars helicopter, Ingenuity. In our D1 headphones, TPC becomes something new: TPCD. A diaphragm so precisely engineered that it controls resonances on a structural basis, eliminating the need for any traditional damping materials at the diaphragm level, and allowing faster, cleaner, and more accurate motion across the audible spectrum. The revelatory TPCD (Thin-ply Carbon Diaphragm) is an achievement made possible through years of dedicated research and development, collaboration, and material exploration A revolution in dynamic drivers Dynamic drivers have always come with compromises: bass versus highs, weight versus stability, quality versus price. The D1 changes all this by rethinking the fundamentals: A transducer with the precision of a studio monitor, which retains the intimacy of a high-end headphone. The ultra-light diaphragm and compact driver design allow for a comfortable, lightweight headphone architecture. Sonic clarity and tonal accuracy for audiophiles who seek fidelity and balance. Built for long, immersive listening sessions without fatigue. Designed with moderate impedance (32 Ω) and sensitivity (100 dB), the D1 pairs with most sources and scales gracefully with premium amplification. This is a dynamic driver headphone that brings professional, studio-grade precision to personal listening, with none of the usual trade-offs. HEDD's guarantee Every unit is handmade in Germany using custom TPCD technology from Composite Sound in Sweden. All components are fully serviceable. We back this commitment to quality and durability with an industry-leading 5-year warranty—rare in this category, and a reflection of our belief that great headphones should be an investment, not a consumable.