Field Test · Studio Gear Review
HEDD HEDDphone Two GT Unplugged
Technical examination of HEDD’s HEDDphone Two GT Unplugged over-ear model
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- HEDDphone Two GT Unplugged
- HEDDphone Two GT Unplugged
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Spec Sheet
- Passive
- Open-back design
- Over-ear design based on the HEDDphone TWO
- With Air Motion Transformer (AMT) with multi-layered Kapton polyimide diaphragm
- Variable Velocity Transformation technology (VVT)
- Frequency range: 10 – 40,000 Hz
- Max. SPL: 88 dB @ 1mW
- Impedance: 41 Ohm
- Adjustable headband (height, width, bend and clamping pressure)
- Velour ear pads
- Made from materials such as carbon fibre and magnesium for low weight
- Connection: Dual 3.5 mm mono jack
- Weight: 550 g
- Includes transport case
Studio Log
| Available since | December 2025 |
|---|---|
| Item number | 631649 |
| Sales Unit | 1 piece(s) |
| Design | Over-Ear |
| System | Open |
| Impedance | 41 Ohms |
| Frequency range | 10 Hz – 40000 Hz |
| Adapter | No |
| Replacable Cable | Yes |
| Marrone/Argento | Black |
| Sensitivity | 88 dB |
| Type Of Connector | Jack (stereo) |
| Weight | 550 g |
Demo Footage
Field Photography
QC Pass — Field Test
Customer Review Summary
Introduction to the HEDDphone Two GT Unplugged
The HEDD HEDDphone Two GT Unplugged represents the brand’s take on high-fidelity open-back headphones designed for critical listening. Priced at £1,490 and available since December 2025, these headphones combine engineering precision with advanced driver technology. This analysis focuses strictly on the technical specifications and design choices made by HEDD to understand the product’s intended performance profile.
Design and Build Quality
The headphones adopt an over-ear, open-back configuration, a choice often preferred by audiophiles and professionals for its ability to deliver a natural and spacious soundstage. The construction utilises materials such as carbon fibre and magnesium, which ensure a low weight of 550 grams, enhancing comfort during extended listening sessions.
Attention to ergonomics is evident in the adjustable headband. It allows modifications in height, width, bend, and clamping pressure, accommodating various head shapes and sizes. The ear pads are made of velour, providing breathability and reducing listener fatigue without compromising the fit.
Connection and Portability
- The headphones employ dual 3.5 mm mono jacks for connectivity, which supports balanced audio setups often used in professional environments.
- A replaceable cable adds durability and flexibility, extending the product’s lifespan and allowing users to upgrade or repair cables as needed.
- While the product lacks an included adapter, it comes with a transport case, suggesting that portability is a consideration despite the open-back design’s typical sensitivity to external noise.
Audio Technology
The defining feature is the Air Motion Transformer (AMT) driver with a multi-layered Kapton polyimide diaphragm, an approach that differs markedly from traditional dynamic drivers. This design alongside HEDD’s Variable Velocity Transformation (VVT) technology aims to deliver precise transient response and controlled acoustic velocity transformation, aiming for clarity and detail across the frequency spectrum.
- The frequency range spans from 10 Hz to 40,000 Hz, covering both deep sub-bass and ultrasonics well beyond the standard human hearing threshold, indicating potential for very detailed and full-bodied reproduction.
- With an impedance of 41 Ohms, the HEDDphone Two GT Unplugged can be driven by a range of devices, although optimal performance likely requires a quality headphone amplifier or dedicated audio interface.
- Sensitivity stands at 88 dB at 1mW, suggesting moderate efficiency. This means volume levels will need to be managed carefully in professional or high-gain setups to avoid distortion.
- The maximum sound pressure level is set at 88 dB, which aligns with the system’s emphasis on accuracy and may reflect a focus on refined listening rather than high-volume output.
Summary of Technical Merits
The HEDDphone Two GT Unplugged brings together a combination of high-grade materials, advanced driver design, and user-focused ergonomics. Its open-back nature and wide frequency response indicate intent for applications requiring detailed and analytical listening, such as studio monitoring or critical home listening.
The adjustable headband and velour ear pads cater to comfort, which is essential given the headphones’ use case may involve many hours of wear. The use of AMT drivers and VVT technology marks a significant departure from more common dynamic driver headphones, potentially offering distinct advantages in clarity and transient accuracy.
The modest sensitivity and impedance profile hint that a dedicated high-quality source will be beneficial to fully exploit the headphones’ capabilities. The dual mono jack connection and replaceable cables further position these headphones towards an audience prioritising audio precision and maintainability.
Conclusion
From a technical standpoint, the HEDDphone Two GT Unplugged stands as a purpose-built product for the discerning listener or professional. Its construction and driver technology support expectations of clear, detailed sound reproduction with an emphasis on realism and spaciousness. While the price point is substantial, the combination of materials and audio engineering indicates a high-end design effort aimed at delivering refined listening experiences.
