The DT 770 Pro Studio Headphones are comfortable closed-back headphones for professionals who require a full bass sound as well as clinically accurate high and mid-range reproduction, and is an indispensable tool for audio and video professionals. By design, headphones eliminate the acoustic interaction with a room that can affect the recording and monitoring of audio signals. The DT 770 Pro provides an excellent reference environment, the standard against which open-air room listening is judged.