



Designed & Made
in the Germany
Ideal for
Indoor Use
Headphone Zone Certified Demo Headphones
Our careful selection of demo headphones gives you the experience of pre-burned in headphones - at drop dead prices. We do this sale every year to clear up our existing demos and to make way for new units instead. These demo headphones have been used at our Experience Studio in Mumbai. The pictures above depict the condition of the product and also indicate the accessories available with the headphone. For any specific questions about the condition please get in touch with us! While the product itself is fully tested by our Headphone Gurus and the outer packaging may have suffered some damage.
GET THE BEST DEAL
You may or may not get the original packaging or some accessories may be missing & because of the fact that they've been extensively used as a demo at the Experience Studio, we give a good discount compared to a new gear.
UNCHANGED REPLACEMENT POLICY
Received a defective Demo unit? Return it under our 7 Day Replacement Guarantee Policy.
P.S. If you do not like your gear, unfortunately we will not be able to accept the return.
PRE-BURNED IN
Demo headphones save you the time of burning in new headphones. Typically, brand new headphones take up to weeks to fully break in and sound as good as they should. With demo headphones, you get to enjoy the best sound out of the box.
UNBIASED CUSTOMER SERVICE
We have the same Headphone Zone customer support experience for Demo Units or any products.
CONSIDER IT VINTAGE
Vintage products have a certain charm that cannot be put into words. Think of old, discontinued demo headphones as vintage. They have a story; they have, how-to-say, character.
PROFESSIONALLY INSPECTED
A thorough inspection means you receive a 100% working headphone with no sound output issues.
BOX CONTENT | 1. HEDDphone Open Over Ear Headphone |
2. 2.2m cable with 1/4" amp-side termination |
WARRANTY | 3 Months |
A REVOLUTION IN HEADPHONE TECHNOLOGY DESIGNED AND MADE IN BERLIN
In Berlin, the HEDDphone was created from the ground up. The HEDDphone is handmade with great care and attention to detail as no machine can, thanks to the exact folding method and careful application of this unique design. Based on American-German physicist Oskar Heil's original Air Motion Transformer (AMT) technology, HEDD creator Klaus Heinz built the first compact and marketable AMT tweeter 30 years ago. Heinz began work on a full-range Air Motion Transformer in 2019 to establish a new ground for this superior transducer principle.




FEATURES WORLD'S FIRST FULL-RANGE AMT DRIVER WITH SUPER-LIGHT KAPTON DIAPHRAGM
Designed for recording artists, music producers, and audiophiles, the HEDDphone® is a cutting-edge headphone. It is the first full-range capable headphone based on the company's technology: the Air Motion Transformer, and it boasts gorgeous and hand-crafted Made in Germany components (AMT). The AMT is built on a super-light Kapton diaphragm which is folded into a magnetic field, as opposed to the standard voice coil, planar, or electrostatic designs. It is made up of several different-shaped folds that squeeze the air in and out, causing it to accelerate by a factor of three. As a result, the original signal is represented in an open, hyper-detailed, and realistic manner. The auditory benefits include increased precision, clarity, and realism in audio reproduction, faster transient response and better treble extension.



EMBEDDED WITH VVT® VARIABLE VELOCITY TRANSFORMATION TECHNOLOGY DELIVERING EVEN FREQUENCY RESPONSE
The HEDDphone uses the patent-pending VVT® diaphragm. This diaphragm extends the AMT principle to a linear full-range headphone transducer using the latest diaphragm geometry. This upgraded folded diaphragm lets air out four times faster and allows the playback of even the little nuances in the audio recording. Engineers modified the initial design by adding new geometries and a more sophisticated system of varied-sized folds to create an even frequency response across the entire audible frequency range. This method is known as VVT (Variable Velocity Transform).




EXCEPTIONAL BUILD OFFERING SUPREME COMFORT WITH SYMMETRIC 4-PIN MINI-XLR FOR EASY CONNECTIVITY
The solid body and functional design of the "HEDDphone" add to its unique architecture, being more reliable. The middle of the top headband piece has a notch, and the two side parts carry the brunt of the weight where the surface area comes into contact with the top of your head. This design means that after a few hours, there will be no hot spot in the middle, and the weight will be distributed to a more variable surface area laterally on the sides of your head rather than pressing down on the centre. The cups are also more tightly clamped inward, allowing part of the weight at the top to be relieved. Furthermore, the pads soften much of the clamp, preventing it from pressing against your jaw. There's a little cup swivel, so getting a good fit isn't a problem. All the materials used are of excellent quality, such as the vegan pleather pads, which provide superior comfort while also being acoustically treated to offer crystal-clear audio. It has a symmetric 4-pin mini-XLR for connectivity, which is rather convenient.



DESIGN | open-back over-ear headphone |
DRIVER | AMT with full-range VVT® technology |
FREQUENCY RESPONSE | 10 Hz - 40 kHz |
EFFICIENCY | 87 dB SPL at 1 mW |
IMPEDANCE | 42 Ω flat |
POWER REQUIREMENT | min. 200 mW, recommended ≥1000 mW |
WEIGHT | 730 g |
CONNECTION | symmetric 4-pin mini-XLR |
BOX CONTENT | 1. HEDDphone Open Over Ear Headphone |
2. 2.2m cable with 1/4" amp-side termination | |


MORE THAN 40-YEAR LEGACY OF PRODUCING TREND-SETTING AUDIO PRODUCTS
HEDD Audio was established on October 2015 by a father-son duo - Physicist Klaus Heinz and Mastering Engineer / Musicologist Dr Frederik Knop. Heinz has dedicated his life towards Physics and Sound. Klaus Heinz has been designing loudspeakers for the last 40 years and these speakers have set a benchmark in multiple industries including the professional music production, mastering, home HiFi among others.
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GEARED TOWARDS THE ULTIMATE GOAL OF DELIVERING SONI EXCELLENCE
HEDD Audio was established on October 2015 by a father-son duo - Physicist Klaus Heinz and Mastering Engineer / Musicologist Dr Frederik Knop. Heinz has dedicated his life towards Physics and Sound. Klaus Heinz has been designing loudspeakers for the last 40 years and these speakers have set a benchmark in multiple industries including the professional music production, mastering, home HiFi among others.
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DESIGNED AND DEVELOPED IN BERLIN, GERMANY
HEDD Audio loudspeakers are designed in Berlin with high standards of digital signal optimization (HEDD Lineariser®), advanced diaphragm and high-performing amplifier. The HEDD Audio studio monitors play a vital role in the development of the Air Motion Transformer. Heinz had introduced his first Air Motion Transformer years ago which transformed the audio industry. At present, the AMT systems are key to precise and dynamic audio reproduction.

3 Months Warranty
Don't sweat it, this HEDD Audio - HEDDphone (Demo Unit) comes with a warranty
from HEDD Audio that covers manufacturing defects.
All products featured on Headphone Zone are backed by an original manufacturer's warranty.
Read more about HEDD Audio's warranty in India.
"HEDD Audio has managed to create a high end headphone which brings freshness to the personal audio world. Bass goes deeper and especially the sub bass is remarkable."
"The Hedd Audio Heddphone is something very special: Here, the so-called Air Motion Transformer (AMT) is used in a headphone, and also as a full-range driver.
Read More"What an outstanding tour de force HEDD Audio has released, what you get is such a transparent and true to life listening experience that they will melt away into the background once you put them on."
"I'm thrilled to report that the HEDDphone does live up to the hype. More importantly, this release changes the landscape for high performance headphones."
"The speed and definition of the HEDDphone’s treble exceed that of any planar and most DDs. The HEDDphone represents the first decently implemented, commerically available AMT headphone."
"They sound great, in a way that’s actually useful for mixing and mastering. Something of a technological breakthrough. Enter the HEDDphone, and a fourth driver technology that eliminates this compromise."
"It’s no secret by now that I had an enjoyable time listening to the HEDDphones. I think they are an absolute beast of a headphone that not only innovates in design but sounds impeccable as well."
"I’m pleasantly surprised that HEDD Audio could produce such versatile and good-sounding headphones in its first try, using a technology that has never been tried in headphones."