No Compromises, No Trade-offs: Sennheiser IE 900 In-Ear Headphones Deliver Performance That Matches That of Premium Over-Ear Models
The fantastic-sounding Sennheiser IE 900 in-ear headphones have shaken up the audiophile world. For years, music lovers have had to choose between either over-ear headphones—which are renowned for superior sonic performance—or in-ear headphones, which offer comfort, convenience, and a small footprint. The wired IE 900 headphones obliterate that dilemma by providing spectacular sound that not only matches that of traditional headphones, but it many cases, handily surpasses it. Wide soundstages and remarkable sonic dynamics will be a part of every listening session—along with wonderful comfort.
Sennheiser made no compromises in the engineering or build quality of the IE 900, elevating the once-humble earbud format into a luxury item that even the most demanding audiophile could love. The precision-manufactured aluminum housing of the IE 900 faithfully protects the dynamic TrueResponse transducers at the heart of Sennheiser's innovative X3R technology. With the hand-assembled IE 900, you can experience the peak of German audio engineering with earphones that deliver only the purest, most natural sound.
The 3.5mm stereo plug allows you to connect to practically any digital audio source, including headphone amps, laptops, and audio interfaces. Each pair of IE 900s also includes symmetrical 2.5mm and 4.4mm cables for plugging directly into hi-fi components with balanced outputs.
Thanks to lightweight materials, an ergonomic design, and a customized fit, you can listen to your favorite music for hours on end, without fatigue. Included with the IE 900 are silicone ear adapters and three elastic foam ear adapter sets in three different sizes. They adapt to the natural shape of your ear for a tailored fit. They're perfect whether you’re at your desk, on a train, or taking a walk through the woods. With IE 900, you’ll never have a listening session spoiled by uncomfortable earphones again.
The included carrying case provides protection when the headphones are not in use, and the cleaning tool helps keep them spotless. You can audition the amazing IE 900 with the confidence that comes with our 100% Music Direct Satisfaction Guarantee.
"Sennheiser's IE 900 combine listenability, insight, and comfort, making them one of the front-runners [in this price class].... While it's possible to plug these Sennheisers straight into anything with a 3.5mm headphone output, they deserve much more than to be used with a phone or laptop..... [If] you have a good enough source and amplification, their build, engineering, and sound quality more than justify ... [the price]."
—What Hi-Fi?, five-star review
"If you're looking for a pair of the best earbuds for audiophiles that can compete with the best over-ear headphones, look no further than the Sennheiser IE 900.... [They are] capable of eking out every last drop of detail from your music, especially if you use them with a good DAC or external amp."
—Olivia Tambini, TechRadar
"The IE 900 does respond nicely to different sources, tips and cables, and as such, it allows you to fine-tune the sound to your liking.... If you're on the [lookout] for a high-end, dynamically driven IEM with a high-quality sound, then the Sennheiser IE 900 should be on your list of [in-ear monitors] to audition."
—Headfonia, Recommended Buy Award
"[These] are some of the best IEMs out there right now. Every aspect of its sound signature meets its standard for detail and clarity, and it also goes above and beyond entertaining you with more colorful characteristics as well.... With the IE 900 I feel like Sennheiser finally has their ace IEM that others can strive to compete with."
—Alex Schiffer, Major Hi-Fi, Gold Award
Astounding Sonic Transparency
The IE 900 headphones reveal the true potential of any recording. If it's a masterpiece, you'll hear it. That includes brilliant, sparkling treble, completely free of sibilance; powerful lows without muddy mid-range tones; and an uncanny ability to resolve fine sonic detail. All these qualities derive from inspired feats of engineering. Examples include Sennheiser's trusted 7mm transducer and the all-new X3R triple-chamber absorber technology milled right into the solid aluminum core with its downstream acoustic vortex. Taken together, these innovations deliver a unique level of balance and transparency—so you never have to compromise again.
Every Nuance, Every Sonic Detail
The IE 900’s TrueResponse driver ensures exceptionally authentic musical reproduction. A large part of its ultra-precise transient response comes from the unique combination of materials in the diaphragm, together with its high inner dampening. So, when the signal stops, the sound stops, too. This is how the IE 900 can reveal details in tracks you thought you knew inside out. But the only thing that truly counts is what you, the listener, hear. The tonality of each instrument becomes clearly audible.
And it's not just the skills of the musicians that the IE 900 can reveal: Even the acoustic properties of the recording studio or concert stage gain a new presence. Instead of remaining on the surface, you can now dive deep into complex passages, all while being immersed in a breathtaking soundstage—just as you would when seated in front of a pair of superb tower loudspeakers.
An Acoustic Back-Volume Establishes Balance
For Sennheiser's team of audio engineers, the goal for the IE 900 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, an acoustic back-volume was employed. It's a small chamber within a chamber tuned to manage the slope and amplitude of the base 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 pleasantly disciplined bass, along with impressive, realistic mid-range tones.
Premium Materials and Legendary Manufacturing Expertise
Well-suited to high-precision milling, aluminum also provides an aesthetically pleasing, long-lasting home for electro-acoustic components. A five-axis CNC machine precisely 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. The drivers in each pair of IE 900s are matched during an automated manufacturing process to practically eliminate variance. The result is consistently superb build quality for every model.
Perfect Connections Yield Tremendous Dividends
When you're seeking the most natural and immersive sonic performance possible, every detail matters. In the IE 900, gold-plated Fidelity(+) MMCX connectors ensure perfect contact. Each termination is seated within a recessed, 4.8mm-wide socket below the surface of the housing, providing strain relief. The cables themselves are meticulously reinforced to withstand many thousands of bend cycles. In short, the IE 900 is built to last.
- New benchmark in portable audio
- Ultimate precision & craftsmanship
- Made in Germany
- X3R technology: TrueResponse transducer combined with three Helmholtz resonator chambers and acoustic vortex
- Precision-milled and anodized aluminum housing
- Hand-assembled at Sennheiser´s headquarters
- Gold-plated Fidelity (+) MMCX connectors for improved stability
- Choice of para-aramid reinforced cables (2.5 mm, 3.5 mm, 4.4 mm)
- Adjustable ear hooks and choice of ear adapters including memory foam
- Frequency response: 5 Hz - 48,000 Hz
- THD: 0.05% (1 kHz, 94 dB)
- Impedance: 16 ohms
Impedance: 16 Ω
Sound pressure level (SPL): 123 dB (1 kHz, 1 Vrms)
THD, total harmonic distortion: <0.05% (94 dB, 1 kHz)
Cable length: 125 cm
Transducer principle: single dynamic driver, pressure chamber
Technology: unique X3R technology
Housing: One-piece precision-milled aluminum housing
Warranty: global 2-year warranty
Connector: Fidelity (+) MMCX
Ear coupling: Ear canal
Frequency response: 5 Hz – 48,000 Hz (-10 dB)
What's in the box:
IE 900 in-ear headphones
Balanced para-aramid reinforced cable with 2.5mm connector
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 with metal serial no. plate
Cable clip, Cleaning tool & Cleaning cloth
Presentation box with signed customer certificate & User manuals
User Manual (PDF, 5.8 MB)