Beyerdynamic DT 770: Impressive Studio Headphones for Critical Listening Beyerdynamic DT 770 Pro closed studio headphones provide professional-quality sound for critical listening applications. Whether you're in the control room or on the recording floor, Beyerdynamic DT 770 Pro headphones are made to deliver accurate sound while providing a very comfortable fit — a real necessity for long sessions. You get an impressive 5Hz-35kHz frequency response, while the closed-ear design helps to minimize outside noise and orient the headphones' speakers to your ears correctly. Built to last and perform reliably, Beyerdynamic DT 770 headphones make a great addition to any studio.