Sennheiser IE900 High-End Audiophile In-Ear Headphones


Discount 23% List price: £1,082.50
We are able to ship to United States - View Rates


IE 900 by Sennheiser sets a new benchmark in portable audio fidelity through technical innovation (X3R), meticulous attention to detail, and an uncompromising demand for perfection. They have been awarded a 5-Star review by What Hi-Fi? in May 2021.

Every aspect of IE 900 has been engineered to work in harmony to achieve the desired acoustic tuning and to reduce resonances and masking effects. The acoustic design ensures brilliant, natural high-end sound reproduction and reveals even the finest details in the music.

The precision-manufactured aluminium housing faithfully protects the dynamic TrueResponse transducers at the heart of Sennheiser's innovative X3R technology. Experience the peak of German audio engineering and manufacturing with earphones that deliver only the purest, most natural sound.

IE 900 fast-forwards past anything that might come between you and your most treasured recordings. You’ll connect to your music in a way no other earphone allows. Imagine hours spent immersed in the finest musical details, from the optimised 7 mm transducers plus innovative X3R resonator chamber technology, to the precision-manufactured aluminium housing — every facet of IE 900 is engineered to deliver the purest, most natural sound.

IE 900 reveals the true potential of any recording. Brilliant, sparkling treble with no trace of sibilance. Powerful lows without creating muddy mids. An uncanny ability to resolve fine detail, alongside warmth and comfort for extended sessions. All these qualities derive from inspired feats of engineering. An improved 7 mm transducer just for the IE 900, an all-new X3R triple-chamber absorber system milled right into the solid aluminium core, with downstream acoustic vortex, together delivering a unique level of balance and transparency — you never have to compromise again.

A large part of IE 900's very 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. The tonality of each instrument becomes clearly audible. And it’s not just the skills of the musicians that IE 900 reveals. Even the acoustic properties of the room gain a new presence. Instead of remaining on the surface, you can now dive deep into complex passages — all while immersed in a breathtaking sound stage.

With IE 900 you can enjoy a fit and quality that rival those experienced by the artists who create your music. Included 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.


  • Innovative X3R technology for an intense listening experience.
  • German-made 7 mm TrueResponse transducer for natural balanced sound.
  • Unique triple-chamber absorber system refines and smoothens high frequencies to perfection.
  • Acoustic vortex milled into the nozzle ensures natural sound wave propagation.
  • Specially developed membrane foil minimises resonances and distortion.
  • Designed, engineered, and manufactured in Germany.
  • Transducers are matched during the manufacturing process to practically eliminate variance.
  • One-piece housing is precision-milled from a single block of aluminium.
  • Hand-assembled by a specialist team at Sennheiser headquarters to razor-thin tolerances.
  • Global 2-year warranty.
  • Lightweight high strength housing offers exceptional durability and long-lasting aesthetic beauty.
  • Form fitting anodised aluminium housing seats securely in the ear.
  • Selection of silicone and foam ear adaptors ensure an optimal fit for high noise isolation.
  • Adjustable ear hooks adapt to the natural shape of the ear for a tailored fit.
  • Para-aramid reinforced cables with gold plated Fidelity+ MMCX connectors ensure longevity of use.
  • A choice of balanced and single-ended cables (2.5mm/3.5mm/4.4mm) for easy connectivity.


  • Transducer principle: Closed-back single dynamic driver, pressure chamber.
  • Transducer size: 7 mm
  • Frequency Response: 5 Hz – 48,000 Hz (-10 dB)
  • Impedance: 16 Ohms
  • Sound pressure level (SPL): 123 dB (1 kHz, 1 Vrms)
  • Total Harmonic Distortion (THD): <0.05% (94 dB, 1 kHz)
  • Technology: Unique X3R technology
  • Housing: One-piece precision-milled aluminium housing
  • Ear coupling: In-ear headphone
  • Weight / Single Earphone: 4 g
  • Weight / Earphones + Cable: 24 g
  • Cable Connector: Gold-plated Fidelity+ MMCX Connectors
  • Jack Plugs: 2.5mm / 3.5mm / 4.4mm


  • 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.

More Information

Delivery and Returns

Your country is set to: United States
Shipping method Delivery Time Cost

Please be advised that we may upgrade your delivery to a better service if we deem it appropriate to designated destinations at no additional cost. Please view our returns policy.
*Quoted delivery times are estimates and apply to normal working days for in stock items.


Try In Store:

Headphone Features

Dynamic Driver Size:
Transducer Type:
Dynamic Driver
Ear Cup:
Closed Back
Headphone Type:
  • Hi-Fi Headphones
  • In-Ear Headphones
  • iPhone / iPod Headphones
  • Smartphone Headphones
16.00 Ohms
Frequency Range:
5 - 48,000 Hz


Worldwide Shipping

Payment Methods

  • Paypal
  • Visa
  • Mastercard
  • All other major credit/debit cards

Our Advantages

  • Worldwide shipping, fast, insured & tracked. Details
  • Clear, simple returns policy. Details
  • UK-based company, established since 1985. Details
  • Visit our London showroom to demo a huge selection of headphones, earphones & portable players. Details