The audiophile Sennheiser HD 650 is the ultimate in open, dynamic headphone design. Developed from the award-winning HD 600, HD 650 headphones feature improved materials for even better sound reproduction. These headphones will captivate you with their expressiveness and emotion while maintaining absolute precision and lifelike reproduction.Selected, matched headphone systems with very tight tolerances (+/- 1dB) Optimized magnet systems for minimizing harmonic and intermodulation distortion Titanium finish Quality metal mesh covers for superb open and transparent sound Reinforced, insensitive to handling noise Plated 1/4" jack plug with adapter lead to 3.5 mm jack plug 1-year warranty