PRO 900. The Acoustic Majesty of Professional Grandeur. The first Ultrasone PRO headphones with the patented S-Logic PLUS technology. Enjoy unlimited sound performance. Trust your ears. New Titanium drivers S-Logic PLUS technology Ultra Soft detachable Cable Diamond-cut Aluminium nameplate Velvet earpds in BLACK & SILVER Hard sided transportation case Neutrik connectors. Short description Foldable, closed-back professional headphones with new Aluminium nameplates New PRO Box (hardcase) for safe transportation and storage, incl. accessories Technologies: S-Logic� Natural Surround Sound MU Metal shielding (ULE-technology) Safer hearing PRO Box contents Professional headphones 2 detachable cables: one straight (length 3 m), one coiled (length > 3 m) with gold- plated jacks 6,3 mm and gold-plated adapter 6,3/3,5 mm Spare pair of speed-switch ear pads Demo CD Instruction manual Technical specifications S-Logic� Natural Surround Sound Dynamic principle Frequency range 8-35.000 Hz Impedance 40 Ohm Sound pressure level 94 dB MU Metal bufferboard, reduced field emissions in accordance with ULE (=Ultra Low Emission) standard Driver 40 mm titanium-plated Weight 295 g (without cord) Long-term availability of spare parts.