Sennheiser HD 650 Audiophile Open-Back Dynamic Headphones-Grey

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 Hz (-10 dB) Hand-selected matched driver elements High power neodymium magnets deliver maximum efficiency Lightweight aluminium voice coils for very fast transient response