Ultrasone comes back with the Pro 900 headphones that provide a high quality sound. These headphones boast a 6-42k Hz frequency range, 40 Ohm impedance, a sound pressure level of 96dB, and a 40mm titanium-plated driver. You will also get an interchangeable spiral and straight cables, and a hard carrying case to protect your precious headset. [MusicRadar]
