beyerdynamic DT 770 i Headphones DT 770 i Headphones The phrase Studio standard is thrown around far too often when describing recording gear That phrase has never been more accurate than when describing the DT-770 by Beyerdynamic Beyerdynamic invented the dynamic headphone 90 years ago, and the DT-770 has been a studio standard, closed-back headphone for over 30 of those years The DT-770 is a tracking headphone