Sennheiser says it has brought together technical innovation, meticulous attention to detail, and an uncompromising demand for perfection to deliver a listening experience without compromise. The German designed and manufactured new model uses Sennheiser's proprietary X3R transducer, a refined version of its 7mm audiophile Extra Wide Band transducer featuring a unique triple-chamber absorber system.

The housings of the earpieces are milled from a single block of aluminium to create the earphones' unique triple-chamber absorber (T3CA) system. Initially developed for the award-winning IE 800, the IE 900 features the next generation of the patented absorber system, which uses three chambers and an acoustic vortex milled into the nozzle “to counter the masking effect.” Sennheiser says this acoustic phenomenon arises as the human ear cannot perceive high-frequency sounds at a low volume if louder sounds in a lower frequency range occur simultaneously. The absorber system prevents undesired peaks by removing the energy from masking resonances, making even the subtlest nuances of sound audible.

Jermo Köhnke, Product Manager at Sennheiser, told StereoNET:

No detail is too small when you're striving to set a new benchmark in portable audio fidelity. We designed every component of the IE 900 to work together to deliver extraordinary audio performance. Whether in long listening sessions at home or on the go, listeners will never have to compromise on their music experience.

A newly developed membrane foil provides a high degree of inner dampening, ensuring minimised natural resonances and distortion. THD is quoted as 0.05% at 94 dB, 1 kHz, while the frequency response is stated as 5 Hz – 48,000 Hz. The specialist team in Wedemark, Germany designs, engineers, and manufactures the IE 900 to what the company says is the highest production standards in the audio industry. Once scanned with precision cameras and passing all quality control checks, the assembled left, and right-side earphones are paired by hand to work together. 

Sennheiser's IE 900 feature a Fidelity Plus MMCX connector, allowing for a choice of cables. Deeper integration into the housing provides better stability for the gold-plated connector. The earphones come with an unbalanced cable with a 3.5mm connector and balanced cables with 2.5mm and 4.4mm connectors. Finally, included are individually adjustable ear hooks as well as silicone and memory foam ear adaptors in three sizes, perfect for extended periods of personal music enjoyment.

The Sennheiser IE 900 will sell for AUD $2,099.95 / NZD $2,199.95

For more information visit Sennheiser