Ultrasone PRO 900i Headphones


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The credo of sound - The black PRO 900i are the first closed PRO headphones to feature the S-Logic® Plus technology.

  • The titanium-coated sound transducer offers acoustics at the highest level. The substantial equipment contained in the transport box of the PRO 900i extra velvet ear pads, a 1.5mm stereo jack and a 3m coiled cable with a 6.3mm NEUTRIK stereo jack. Professionals swear by the sound and technology expertise of the PRO 900i.

  • S-Logic® Plus is the cutting-edge advancement in the S-Logic® Natural Surround System, squeezing the BIG S-Logic® soundstage found in our PRO, Performance, Edition, HFI and DJ headphone models. S-Logic® Plus profits directly from innovations developed for our flagship Edition range, the ultimate headphones for critical listening. This sophisticated new technology combines precision dampening with micro-acoustic reinforcement, allowing driver, buffer-board, and spatial parameters to complement one another in an optimal manner. So the acoustically redesigned ear-cups of these new models and their tonal fine-tuning result in a most neutral sound impression with more vivid perception of voices and instruments.

    How does S-Logic® Natural Surround Sound work?

    S-Logic® sends music around your head not just into it, because this technology uses decentralized driver positioning. Did you know that you use and need the outer ear for your three-dimensional understanding to define the direction and distance where a sound comes from?

    Instead of hitting the inner ear directly, with S-Logic® the signals are reflected off the surface of the outer ear in different directions before entering the auditory canal to create a natural three-dimensional Sound. S-Logic® is the only headphone system which includes your entire sense of hearing. S-Logic® does not change your personal hearing, it intensifies it for your individual needs and listening pleasure. S-Logic® does neither need artificial echo nor digital sound processing or cross over run time delay. You can hear the sound just the way the sound engineer has mastered it.

    S-Logic® does not only create a Natural Surround Sound sensation. S-Logic® allows at the same time a reduction of sound pressure levels at the eardrum by up to 40% (3 - 4 dB). This may reduce the risk of hearing damage while ensuring hours of fatigue-free listening.

  • Principle: dynamic, closed

    S-Logic® Plus technology ULE technology

    Impedance: 40 Ohm

    Driver/Driver size: Mylar/Titan, 40mm

    Magnet: NdFeB Frequency range: 6 - 42000 Hz

    SPL: 96 dB

    Weight (excl. cord): 295g

    Accessories: 1.5 m USC (ultra soft cable) with a 3.5 mm stereo jack 3 m coiled cable with 6.3 mm NEUTRIK stereo jack 2nd pair velvet ear pads transportation box Instruction manual