Simply beautiful sound, and the lengths Sennheiser will go to achieve it — that is the story of the IE 600. These in-ear devices not only reproduce the detail and emotion of a recording, they transcend it. Because each earphone is a masterpiece. From the hand-finished amorphous metal housing to high-end audio components developed and made by Sennheiser, everything is manufactured to the strictest tolerances. The balanced frequency response and extremely durable materials have been engineered to provide clear, natural voicing and a unique aesthetic that will retain its good looks for decades.
Resilient AMLOY-ZR01 amorphous metal housing, 3D-printed in Germany
Direct, neutral tuning with fast, accurate bass
Select 7 mm TrueResponse transducers optimised to achieve the lowest possible distortion
Exceptionally neutral sound thanks to dual resonator chambers D2CA
Gold-plated Fidelity (+) MMCX connectors for reliable connections
Choice of para-aramid reinforced cables (3.5 mm, 4.4 mm)
Adjustable ear hooks and choice of ear tip adapters
Frequency response: 4 Hz – 46.5 kHz
06% THD (1 kHz, 94 dB)
Impedance: 18 ohms
»Amorphous alloys are an extraordinary new class of materials. Our high-tech AMLOY ZR01 is used in components for aerospace and MedTech applications that require ultra-high precision and robustness. We are proud that Sennheiser evaluated our space-grade amorphous alloy and decided to use it for the IE 600.«
Jürgen Wachter, Global Head of Heraeus AMLOY Technologies GmbH
Get closer to your music
Whatever type of music moves you, with the IE 600 it moves you more. Enjoy not only the notes, but also the subtle scratch of bow on string, the faint chirp of fingers gliding to the next chord on the guitar. Exquisitely neutral acoustic voicing brings your music closer, makes it more alive and vivid, yet pure and natural. Within this delicate balance, the IE 600 nevertheless manages to incorporate powerful yet fast and accurate low-end response. It’s all in a day’s work for Sennheiser’s TrueResponse transducer, the single 7 mm driver responsible for the extra-wide frequency range and ultra-low distortion of the IE 600.
Balanced, neutral voicing
To achieve a natural sound reminiscent of the neutrality provided by high-end studio monitors, our engineers carefully tuned the acoustic back volume inside the nozzle of the IE 600. This voicing lends a presence and intimacy that brings listeners closer to the music, allowing them to discover new accents and details. However, arriving at this level of poise and naturalness was not without challenges. When similar sounds occur in a track simultaneously, for instance, it can become difficult for the human ear to resolve all the nuances. The IE 600 integrates dual two chamber absorbers (D2CA) which capture and attenuate these masking frequencies, revealing even the finest textures of your music.
Stronger than steel, built to last
Researchers have worked for many years to perfect amorphous metals for manufacturing. The wait was worth it — the zirconium alloy from Heraeus Amloy Technologies we chose for the IE 600 has triple the hardness and flexural strength of high-performance steel. Shock-frozen during manufacturing, amorphous metals never have a chance to form a crystalline structure like conventional metals. The result is a lustrous, satiny surface that is extraordinary resistant against corrosion and scratches. The IE 600 housing is fabricated using metal-powder-based 3D printing that can create any shape imaginable within tight tolerances. Chambers and channels form as part of this additive manufacturing process with no milling required. However, cost does limit the potential applications of this new material. One of the only places you’ll find it — besides ultra-high-end products like the IE 600 — is in the drilling head of a NASA Mars Rover where extraordinary resilience in extreme conditions is required.
Automated manufacturing, handcrafted finish
Production of the amorphous metal housing takes place in Germany and includes both automated and manual steps. A computer-controlled laser sinters a thin coat of metal powder, welding the molten alloy to the already hardened material beneath it. Layer by layer, the part builds up to its ultimate shape. A technician then removes any artifacts of the manufacturing process by hand. After thorough cleaning, steel shot blasting, polishing, and sophisticated surface treatment, the housing assumes its final, extremely durable aesthetic. Even daily use leaves practically no evidence in the form of scratches or wear.
A faithful companion on your sonic journey
Each TrueResponse transducer is assembled by Sennheiser and built to last. One of the most advanced production lines of its type in the world, our manufacturing facility has a singular purpose — to exceed the expectations of audiophiles. That’s how we consistently achieve channel matching that makes left-right differences nearly undetectable. And total harmonic distortion to rival anything on the market. All this product quality is cocooned inside extremely resilient amorphous metal, ensuring your IE 600 earphones will remain in mint condition for countless years. With robust protection against corrosion and marks from wear, the IE 600 was designed to keep delivering acoustic — and visual — joy for decades.
The comfort of a tailored fit
The IE 600 packs big sound into a small, ergonomic package. The gold-plated MMCX connectors are recessed in the housing for greater stability and guidance. They support cable diameters of 4.8 mm and smaller, allowing you to plug into a wide range of audio sources as well as hi-fi components with balanced outputs. Choose between para-aramid reinforced unbalanced and balanced cables: 3.5 mm and 4.4 mm are included, 2.5 mm are sold separately. Two different styles of earbud tips — silicone and memory foam — are provided in three sizes to establish a comfortable seal in any ear. Flexible, adjustable ear hooks further enhance the long-lasting comfort.
What's in the box?
IE 600 in-ear headphones
Unbalanced para-aramid reinforced cable with 3.5mm connector
Balanced para-aramid reinforced cable with 4.4mm connector
3 pairs of silicone ear adapters (S, M, L)
3 pairs of foam ear adapters (S, M, L)
Premium carry case
Cable clip, Cleaning tool
Presentation box with signed customer certificate User manuals
Impedance: 18 Ω system impedance
Transducer principle: single dynamic driver, pressure chamber
Weight w/o cable: 6g each
Warranty: global 2-year warranty
Connector: Fidelity (+) MMCX
Frequency response: 4 – 46,500 Hz
Sound pressure level (SPL): 118 dB at 1 kHz, 1 Vrms
Ear coupling: Ear canal
Cable length: 125 cm
Technology: Unique dual-chamber absorber system
Housing: ZR01 amorphous zirconium housings 3D printed in Germany
THD, total harmonic distortion: <0.06% (1 kHz, 94 dB)