The 600 ohm version of the DT 770 Premium line. Excellent choice for high output usage and headphone amplifiers, i.e. beyerdynamic A1 (see LINKS). Handcrafted in Germany, the DT 770 is a perfect combination of design and function. This headphone features a true sound definition with phenomenal bass response and the closed design ensures excellent ambient noise attenuation to enjoy music without any disturbances.