German Audio Excellence with X3R Tech & 7mm Driver

The Sennheiser IE 900 uses X3R triple-chamber absorber tech with a 7 mm TrueResponse transducer and an acoustic vortex for high-quality, natural sound. Precision-manufactured solid aluminium housing eliminates resonance, delivering pure sound. German engineering excellence ensures the best audio experience.

Enjoy Detailed Treble And Powerful Bass

Designed to highlight recording-like sound, the IE 900 is a masterpiece that produces detailed sound with bright trebles and impactful bass. To recreate the sonic experience of a studio or a concert hall, the IE 900 offers a well-balanced and transparent sound ensuring that you don't have to compromise when it comes to quality sound.

A single dynamic driver only — of the highest quality, of course.

In developing the IE 900, Sennheiser faced a fundamental choice. The inherent compromises multi-driver systems require (phase issues and the resulting distortion in overlapping frequency bands) made the decision easy. There would be a single dynamic driver only — of the highest quality, of course. To get exactly the sound we were looking for, we designed a sophisticated system of three Helmholtz resonators — a crucial element in the X3R technology - milled right into the solid aluminum housing of each earphone. These tiny channels eliminate resonance peaks which can color the sound signature and alter the feel of your music. In addition, a complex structure in the nozzle of each earphone — the Vortex — swirls acoustic energy in these frequency bands to smooth out peaks.

Experience acoustic back voloume. A technology used to ensure accuracy across this critical frequency band.

The goal was to achieve a transparent sound with no distracting peaks or troughs. One thing this requires is clear separation of lows and mids. To ensure accuracy across this critical frequency band, we’ve employed what is known as an acoustic back volume. It’s a small chamber within a chamber we have tuned to manage the slope and amplitude of the bass lift. The way the back volume helps achieve such a clear and natural sound signature is by controlling the direction and overall volume of air as it moves through the transducer system. What you hear is a pleasantly disciplined bass and mid-range experience. Unpleasant resonances and listening fatigue vanish in this small space with a big effect.

The IE 900 is build at Sennheiser's state-of-the-art audiophile manufacturing plant in Ireland.

It's the same facility that builds the revered HD 800S, HD 820, HD 650 and HD 600. The use of aluminum was a clear choice: well-suited to high-precision milling, it also provides an aesthetically pleasing, long-lasting home for the electro-acoustic components. A five-axis CNC machine precision cuts each housing individually from a single block of aluminum. The result is truly a work of art. Once anodized, the housing is highly resistant to wear and corrosion — music to the ears of any daily listener. The drivers in each pair of IE 900s are matched during our automated manufacturing process to practically eliminate variance. The result? A transparent soundstage with no gaps or holes.