Beyerdynamic DT-990 Pro Acoustically Open Headphones (250 Ohms)The Beyerdynamic DT 990 PRO is an open dynamic headphone of exceptional quality suitable for the most demanding professional and audiophile applications. The reduced weight of the diaphragm and moving coiling result in a similar pulse characteristic as electrostatic headphones, and in combination with a carefully tailored frequency response offer a natural and balanced sound. Soft ear pads and adjustable, sliding, earpieces together with a very