Field Test · Studio Gear Review
HEDD HEDDphone Two Unplugged
Examining the build and audio specs of HEDD’s open-back HEDDphone Two Unplugged
HEDD
- HEDDphone Two Unplugged
- HEDDphone Two Unplugged
- Studio Headphones
- Accessories & matching items
- Compare options
- Smart Navigator
Spec Sheet
- Open-back design
- Cable not included
- Over-ear design with Air Motion Transformer driver and Variable Velocity Transformation (VVT)
- Frequency range: 10 – 40,000 Hz
- Max. SPL: 89 dB @ 1mW
- Impedance: 41 Ohm
- Adjustable headband (height, width, bend and clamping pressure)
- Headband and earpads made of faux leather
- 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 | 631647 |
| Sales Unit | 1 piece(s) |
| Design | Over-Ear |
| System | Open |
| Impedance | 41 Ohms |
| Frequency range | 10 Hz – 40000 Hz |
| Adaptor | No |
| Replaceable Cable | Yes |
| Colour | Black |
| Max. SPL | 89 dB |
| Type Of Connector | Jack(stereo) |
| Weight | 550 g |
Demo Footage
Field Photography
QC Pass — Field Test
Customer Review Summary
[META]In-depth review of the HEDD HEDDphone Two Unplugged, highlighting its open-back design, Air Motion Transformer driver, and adjustable fit features.Introduction
HEDD’s HEDDphone Two Unplugged entered the market in December 2025 as a premium over-ear headphone option, priced at £1,277. Designed with an open-back system, it targets audiophiles seeking greater sound stage and detail. This analysis delves into the technical aspects of the headphones, focusing on design choices, driver technology, and usability factors.
Design and Build Quality
The HEDDphone Two Unplugged features an over-ear, open-back design aimed at delivering natural sound reproduction. The use of carbon fibre and magnesium in the construction helps maintain a lightweight profile at 550 grams, which is relatively standard for high-end open-back headphones. The black finish and faux leather headband and earpads provide a premium aesthetic and comfort.
The adjustable headband allows tuning of height, width, bend, and clamping pressure to accommodate diverse head shapes and sizes, a necessary feature given the 550-gram weight. Comfort is critical for extended listening sessions, especially at this price point.
Driver Technology and Frequency Response
Central to the HEDDphone Two Unplugged is the Air Motion Transformer (AMT) driver, combined with Variable Velocity Transformation (VVT) technology. The AMT driver, less common in headphones, functions by rapidly squeezing air through folded pleats, promising fast transient response and detailed high-frequency reproduction.
The frequency range from 10 Hz to 40,000 Hz surpasses the standard human hearing limit, allowing for extended low and high-frequency playback. This wide spectrum suggests potential for revealing nuanced audio details, benefiting genres that demand precision, such as classical and jazz.
With an impedance of 41 Ohms, the headphones are moderately easy to drive with portable devices, though the lack of an included adaptor or cable means users must select compatible components thoughtfully.
Sound Pressure Level and Sensitivity
The maximum sound pressure level of 89 dB at 1mW indicates these headphones operate efficiently without requiring excessive amplification. While this SPL level is modest compared to some closed or dynamic driver headphones, it aligns with the delicate balance of the open-back design and AMT driver performance, prioritising clarity over loudness.
Connectivity and Accessories
Connectivity is handled through dual 3.5 mm mono jack connectors, reflecting the professional-grade nature and possible modular use. However, the absence of a supplied cable might inconvenience some buyers and adds to the overall investment needed to fully utilise the product. The replaceable cable feature is a useful aspect for maintenance and customisation.
The inclusion of a transport case enhances portability and protection, important for a product positioned at this level.
Summary
- The HEDDphone Two Unplugged offers an advanced driver system uncommon in headphones, providing a wide frequency response and natural open-back sound.
- Build materials and adjustable fit features balance durability and comfort, essential for prolonged wear.
- Moderate impedance and SPL make the headphones accessible with a range of sources, though the lack of a cable requires additional accessories.
- At £1,277, this model suits audiophiles or professionals seeking an open and detailed audio experience with a focus on design innovation.
Overall, the HEDDphone Two Unplugged represents a technically ambitious design with specialised driver technology and build quality tailored for discerning listeners. Buyers should be prepared to supply their own cables and ensure their playback devices can drive these headphones effectively to fully benefit from their capabilities.
