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Ultrasone PRO 550i

Closed-back Studio Headphones

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  • Pro 550i (Angle)
  • Pro 550i (Case)
  • Pro 550i (Angle)
  • Pro 550i (Side)
  • Pro 550i (Folded)
£199.00 (inc VAT) £165.83 (exc VAT)
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5 Years
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Related & Alternate Products

More power & less strain - The 50 mm Mylar sound transducer of the light grey PRO 550i closed headphones produces a clear sound combined with impressive sound intensity and strength.

The PRO 550i headphones also deliver a powerful bass and allow for a precise localisation of instruments. thanks to its closed design, background noises is systematically suppressed. Equipped with the standard accessories in the PRO box (a 3m coiled cable with a 6.3mm stereo jack, a 0.8m straight cable with a 3.4mm stereo jack and a second pair of ear pads), the PRO 550i is a true favourite among bass players, drummers and guitarists.

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, HiFi 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 decentralised 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.

ULE-technology - (Ultra Low Emission) - MU Metal shielding

Most headphone drivers produce low-frequency magnetic fields as they convert an electrical signal into the acoustical signal that we hear as music. Ultrasone has developed a special MU Metal shielding that we call ULE (for Ultra Low Emissions) to reduce this radiation by up to 98%, compared to conventional headphones. This technology has withstood the test of international review and is recommended by technical surveillance organisations. Ultrasone originally developed ULE-technology for Professionals, since they spend half of their lives in headphones. But due to overwhelming consumer demand, we are pleased to offer ULE in the other Ultrasone lines.


  • Principle: dynamic, closed
  • S-Logic PLUS technology
  • ULE technology
  • Impedance: 64 ohm
  • Driver/Driver size: Mylar, 50mm
  • Magnet: NdFeB
  • Frequency range: 10 - 22000 Hz
  • SPL: 102 dB
  • Weight (excl. cord): 295g


  • 2 detachable cables: 3m coiled cable with 6.3mm stereo jack, 0.8m straight cable with 3.5 mm stereo jack
  • 2nd pair speed-switch velour ear pads
  • transportation box

SKU: pro550i

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