Original price was: $1,499.95.$359.79Current price is: $359.79.
Sennheiser invests significantly in research and development to create advanced audio technologies
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Additional Features
A new benchmark in portable sound reproduction
Developed in Germany and manufactured at our state-of-the-art Ireland plant
Helmholtz resonator chambers unmask critical audio details, even during extended listening sessions
Gold-plated Fidelity (+) MMCX connectors for improved stability
Adjustable ear hooks and choice of ear adapters including memory foam
THD: 0.05% (1 kHz, 94 dB)
Unrivalled precision & craftsmanship
X3R TrueResponse transducer technology for balanced sound with ultra-revealing detail
Precision-milled and anodized aluminum housing
Choice of para-aramid reinforced cables (2.5 mm, 3.5 mm, 4.4 mm)
Frequency response: 5 Hz – 48,000 Hz
Impedance: 18 ohms
What’s in the box:
Sennheiser IE 900 owner’s manual
In-ear headphones
48″ Balanced cable with right-angled 2.5mm connector
48″ Balanced cable with right-angled 4.4mm connector
48″ Unbalanced cable with right-angled 3.5mm connector
3 Pairs of silicone ear tips
3 Pairs of Visco memory foam ear tips
Zippered carrying case
Clothing clip
Cleaning tool
Cleaning cloth
Instruction Manual
Certificate of Authenticity
Technical Specifications
Transducer principle: dynamic, Extra Wide Band (XWB)
Transducer size: 7 mm
Frequency response (speaker): 5 Hz – 48,000 Hz
Ear coupling: In-ear, closed
Sound pressure level (SPL): 123 dB (1 kHz, 1 Vrms)
Total harmonic distortion (THD): < 0.05% (1 kHz, 94 dB)
Cable length: 1.25 m
Connector: stereo jack plug, gold-plated, MMCX plug
Impedance: 18 Ω
Attenuation: -10 dB
Sennheiser really nails it on excellent isolation, proving that you don’t need apps and noise cancellation to quiet the world. In a highly digital world, the aluminum housing reminds us that humans still like nicely made objects. The in-ear monitors provide great sound quality
Customer photos and videos
Sennheiser IE 900 
Yet again the Germans knock it out of the park with these top notch earbuds. The price may serm daunting to some but once you listen to a few of your favorite song you can hesr that you get what you pay for. Thsnks guys
Really nice for music£¬especially classic muisc£¬i had a hd800s and compare to the ie-900s£¬hd800s is heavier and really hot when summer£¡Obviously ie900 is more suitable for me, because I hate hot summer, so a small in-ear headset is more suitable!£¡
After trying several different setups I can say im finally satisfied. Sounds infinitely better than my Bose qc20 wired earbuds/ soundblaster ae-5 pure pcie card. These sennheisers, paired with Schiit hel+ mission-critical hits the perfect spot for my needs. Huge sound stage. Can hear the quietest footsteps during gunfire and nades. Worth every penny if you got it to spend.
I was skeptical, I ordered a few different IEMs and not only are these lightweight but they offer a completely different sound compared to other IEMs in the same price range. I think what ultimately sold me was the ear fatigue was just NOT there. As compared to the other IEMs where I could only use for a few hours before I needed to rest my ears.
Build quality is exceptional. Great fit with many tip options for different size ears. (I prefer the medium memory foam tips.) Love that it includes three types of cables for a variety of connectivity options. Balanced 4.4mm works great with my portable DAC. Bass is incredible for an IEM. Mids are slightly suppressed, but not to a degree that distracts from the music I listen to.