Character
Professionally designed and equipped headphones. Detachable cables, extra cable, speed-switch earpads incl. a spare pair of earpads, hardcase for storage and transportation and many more details meet professionals� needs. The 50 mm heavy duty driver is producing an imposing sound intensity. Tight and powerful bass plus precise and detailed instrument placement is given. Combined with all useful accessories included in the new PRO hardcase, the closed PRO 550 finds his fans within bass players and drummers. Due to requests we implemented an additional function which enables you to fold these headphones easily.

ULE-technology & PRO design
PRO headphones stand for Ultra Low Emission (ULE-technology) with significant benefits for professional users and PRO headphones show a specific design. The PRO appearance does not only distinguish the professional line but also allows due to more ear anatomy area a higher degree of transparency in combination with the spatial sense and understanding. To understand what ULE-technology does, you need to know that most headphone drivers produce low-frequency magnetic fields as they convert an electric signal into an acoustical signal you hear as music. In response, Ultrasone developed a special MU Metal shielding (ULE-technology) to reduce the radiation by up to 98% compared to current headphones. The ULE-technology has stood the test of international review and is recommended by technical surveillance organisations. Ultrasone originally developed the ULE-technology for professionals as they do spend half of their lives in headphones. But due to grand requests the ULE-technology has now been integrated in other Ultrasone headphone lines.

S-Logic Natural Surround Sound
Through the S-Logic Natural Surround Sound the usual headphone sound will be moved out of the head in the room around you. The sound is no longer locked in, but appears broad and detached. Directions and distances can be heard and perceived - it 19s just like being in a live concert. For this new technology additional equipment is not required. Take a pair of ULTRASONE headphones plus your sound device and you will be ready for the 3-dimensional sound enjoyment!

Safer hearing
S-Logic does not only create a Natural Surround Sound. S-Logic allows at the same time a reduction of sound pressure levels by up to 40% (3-4 dB) for the same loudness sensation. This may reduce the risk of hearing damage while ensuring hours of fatigue-free listening. However, Ultrasone generally advises not to listen to music at high volumes to prevent hearing damage.

Technical specifications:
S-Logic Natural Surround Sound Dynamic principle Frequency range 8-22KHz Impedance 64 Ohm Sound pressure level 102 dB MU Metal bufferboard, reduced field emissions in accordance with ULE (=Ultra Low Emission) standard Driver 50 mm Mylar Weight 295 g (without cord) Long-term availability of spare parts

The PRO 550 (formerly the PROline 550) builds on the immensely popular HFI-580 (formerly the HFI-550) to create a professional headphone that is both durable and versatile. Featuring the same 50mm Mylar driver able to crank out lots of volume and punch, the PRO 550 also includes detachable cables and earpads. Updated for 2008, the PRO 550 now features thicker earpads and headband pad, brushed aluminum nameplate on the earcups and a nylon hardcase to protect your headphones on the go.

Best For: Drummers, Bassists, DJs Ultrasone has instated a new policy. Warranties will be included for headphones purchased at MAP price or above.