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Simply beautiful sound, and the lengths Sennheiser will go to achieve it: that is the story of the IE 600. These IEMs not only reproduce the detail and emotion of a recording, they transcend it. Each earphone is a masterpiece, from the hand-finished amorphous metal housing to high-end audio components developed and made by Sennheiser. 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.
To achieve a natural sound reminiscent of the neutrality provided by high-end studio monitors, Sennheiser 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. For instance, when similar sounds occur in a track simultaneously, it can become difficult for the human ear to resolve all the nuances. The IE 600 resolves this by integrating dual 2-chamber absorbers (D2CA) which capture and attenuate these masking frequencies, revealing even the finest textures of your music.
The zirconium alloy from Heraeus AMLOY Technologies chosen 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 extraordinarily resistant against corrosion and scratches.
"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
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 limits the applications of this new material. Outside of the IE 600, one of the only other places you’ll find it is in the drilling head of a NASA Mars Rover where extraordinary resilience in extreme conditions is required.
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 evolves into 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.
Whatever type of music moves you, with the IE 600, it moves you more. 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.