Features

Overview: The Sennheiser IE 900 flagship in-ear headphones sets a new benchmark in portable audio, combining audiophile performance, innovative technology, and a aesthetically beautiful design. Three 4' cables are included, two with balanced connections, to work with your choice of source devices. The IE 900 comes with 3 pairs of foam and 3 pairs of silicone ear tips to help you find the best fit and comfort. The headphones can be stored in the included premium zippered carrying case.

X3R Technology: The brilliant one-piece aluminum housing is precision-milled by a 5-axis CNC machine from a single block of aluminum. Sennheiser engineers designed a sophisticated system of three Helmholtz resonators which are milled right into the solid aluminum housing. These tiny channels eliminate resonance peaks which color the sound. An acoustic vortex is milled into the nozzle to smooth out peaks and ensure a more natural sound. The housing is anodized to make it highly resistant to corrosion, as well as wear and tear. The earphones are lightweight, and are form-fitting to seat securely in the ear. Each in-ear headphone is hand-assembled by specialists at Sennheiser's state-of-the-art facility in Tullamore, Ireland within razor-thin tolerances.

TrueResponse Driver: The IE 900 utilizes a 7mm TrueResponse dynamic transducer for brilliant, detailed highs, rich mids, and powerful lows that don't turn muddy. A specially developed membrane foil acts to minimize acoustic resonance and distortion. The drivers in each pair of IE 900s are superbly matched during the automated manufacturing process to eliminate variance.

Cables: Three interchangeable audio cables are included to let you choose the cable that fits to your audio source. For high-end digital audio players, DACs, and headphone amps, you can use the balanced cables with 2.5mm or 4.4mm (Pentaconn) plugs. For everyday and single-ended (unbalanced) source units, you can employ the cable with the 3.5mm plug. Each terminal is set at a right angle. All three cables are para-aramid reinforced to withstand the routine of winding and straightening that occurs with each listening session. An adjustable cinch is provided above the yoke for a more secure fit, and a cable clip is included to fasten the cable to your clothing. On the headphone end, the IE 900 uses gold-plated Fidelity+ MMCX connectors that make it easy to swap the cables anytime you want, and adjustable ear hooks that adapt to the natural shape of the outer ear.

Ear Tips: The IE 900 in-ear headphones come with two types of ear tips and three sizes to ensure you have the best fit, acoustic seal, and noise isolation. The Visco Memory Foam ear tips adapt to the shape of the ear canal to provide an optimal fit. Prior to inserting, the foam tips should be compressed between the fingers for a few seconds. After insertion, the earphone should be held in place until the memory foam expands. The silicone ear tips are soft and plyable to provide a secure fit. Each ear tip type comes in three sizes -- small, medium, and large -- for the best fit. When the ear tips are properly fitted, the result is a 26dB attenuation of ambient noise. The supplied cleaning tool has a specialized tip for removing any buildup of ear wax in the ear tips, nozzles, and the sound channel grilles.

Specifications:

• Frequency Response: 5Hz - 48kHz (-10dB)
• Sound Pressure Level (SPL): 123 dB (1 kHz/1Vrms)
• Total Harmonic Distortion (THD): < 0.05 % (1 kHz, 94 dB SPL)
• Attenuation: -26dB
• Impedance: 16 Ω
• Ear Bud Dimensions: Width 0.813" Height 0.687" Depth 0.672"
• Total Weight: 0.25 ounces (without cable), 0.8 ounces (with cable)