The essentials to know about the HEDDphone ONE reference headphone
- Full-range AMT technology: the famous HEDD Air Motion Transformer, adapted into headphones for ultra-precise listening.
- VVT (Variable Velocity Transformation): optimized fold geometry for an extended and smooth response from 10 Hz to 40 kHz.
- Open-back design: wide soundstage, natural stereo imaging, and an "honest" rendering for mixing and mastering.
- Durable construction: robust components, comfortable premium vegan ear pads designed to last.
HEDDphone ONE: HEDD's AMT, from monitors to reference headphones
Founded in Berlin in 2015 by Klaus Heinz and Dr. Frederik Knop, HEDD (Heinz ElectroDynamic Designs) first made its mark in studio monitoring with its AMT tweeters. With the
HEDDphone ONE, the brand transposes this technological signature into a headphone format, aiming for reference listening for professionals as well as demanding audiophiles. This "full-range AMT" approach stands out from dynamic, planar, or electrostatic drivers by delivering a reproduction focused on speed, micro-dynamics, and airiness.
An open-back headphone for mixing, mastering, and critical analysis
The HEDDphone ONE targets sound engineers, producers, and creators who want to
hear details without artifices: reverb placement, depth of layers, treble balance, transient texture, attack precision. Its open design promotes long listening sessions, with a spacious soundstage and a sense of space close to speaker listening.
With an efficiency of
87 dB SPL at 1 mW, it reveals its full potential with a
solid headphone amplifier: ideally plan for an amp capable of delivering at least
1 W at 32 ohms to maintain impact, headroom, and control in the bass.
AMT + VVT: transient speed, treble extension, realism
At the heart of the HEDDphone ONE is an
AMT driver based on a pleated Kapton diaphragm placed in a magnetic field. The principle: air is sucked and compressed through each fold, which accelerates air movement and improves responsiveness. The result: a sensation of
precision and
clarity particularly useful for judging compression, de-essing, or the brightness of a voice without artificial harshness.
VVT: a more homogeneous response across the entire band
To achieve a smoother curve across the spectrum, HEDD refined the AMT architecture with specific geometries and a system of variable-sized folds, called
Variable Velocity Transformation. This optimization contributes to coherent listening, with high definition, natural timbre, and stable spatialization.
Symmetrical connectivity and premium comfort
The
4-pin symmetrical mini-XLR connection meets the standards of high-end studio setups. The ear pads made from premium vegan materials combine softness and durability for extended sessions while maintaining good stability on the head.
Technical specifications
Design
- Type: open-back over-ear headphones
Driver
- Technology: HEDD AMT with VVT (Variable Velocity Transformation)
Audio performance
- Frequency response: 10 Hz - 40,000 Hz
- Efficiency: 87 dB SPL at 1 mW
- Impedance: 42 ohms
Connectivity and amplification
- Connection: 4-pin symmetrical mini-XLR
- Amplification recommendation: at least 1 W at 32 ohms
Comfort and construction
- Ear pads: premium vegan materials, soft and durable
- Weight: 718 g
- Manufacturing: hand-assembled in Berlin, Germany
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