Sennheiser Consumer Audio HD 650 - Audiophile Hi-Res Open Back Dynamic Headphone, Titan

Specially designed acoustic silk ensures precision damping over the entire frequency range and helps to reduce THD to an incredible 0.05 percent Improved frequency response is 10 39,500 Hertz ( 10 dB) Hand selected matched driver elements; Highly optimized magnet systems for minimum harmonic and inter modulation distortion High power neodymium magnets deliver maximum efficiency; 3.5 millimetre jack plug. Frequency response (Headphones):10 41000 Hz Lightweight aluminum voice coils for very fast transient response Cable length 118 inches