Ultimate Ears UE900s IEMsearch

Ultimate Ears UE900s IEM

Ultimate Ears UE900s IEM

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4 Balanced Armatures, Comfortable Fit

Aiming for the sound of a custom in-ear monitor with the convenience of a universal fit, the Ultimate Ears UE900s is well suited for personal listening and professional applications alike. The IEM features a small shell that rests comfortably in most ears, regardless of size or shape, thanks to the proprietary fit tip system. With nine different tip sizes to choose from, you can simply lift up the tip sticks and find the best fit. The tips sit on the tip sticks in a unique angle to create an excellent seal. This IEM has four proprietary balanced armature drivers: two for bass, one for midrange, and one for treble. The quad design delivers rich, clear audio, while the three-way crossover and dual bore sound channels keep the highs, mids, and lows phase aligned. Finally, the removable MMCX cable is equipped with an inline mic and iOS controls. 

Ultimate Ears UE900s IEM
Ultimate Ears UE900s IEM
Ultimate Ears UE900s IEM
Ultimate Ears UE900s IEM

“Big on Transparency”

In a Sound & Vision review, Steve Guttenberg says, “The Ultimate Ears US900s look, feel, and sound right. They’re big on transparency without shortchanging body and soul.” Read more here.

Ultimate Ears UE900s IEM
Ultimate Ears UE900s IEM
Ultimate Ears UE900s IEM
Ultimate Ears UE900s IEM

Unboxing & Overview


  • Ultimate Ears
  • Driver unit: 4 proprietary balanced armatures, 3-way crossover
  • Input sensitivity: 101.2 dB at 1 kHz, 50 mW
  • Frequency response: 20 Hz–20 kHz
  • Noise isolation: -26 dB of ambient stage noise
  • Impedance: 30 ohms at 1 kHz
  • Input connector: ⅛ in (3.5 mm) headphone jack


  • 6 sizes of silicone ear tips (2 tips per size)
  • 3 sizes of memory foam tips (2 tips per size)
  • Protective case/pouch
  • Removable MMCX cable with inline iOS controls and mic
  • Maintenance gel
  • User documentation
  • Manufacturer's 1-year warranty


All orders will be shipped by Massdrop.

Estimated ship date is July 5, 2018 PT.

After the drop ends, payment will be collected and the group’s order will be submitted to the vendor up front, making all sales final. Check the discussion page for updates on your order.

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