The RP-HD7 closed stereo headphones with a 40 mm driver reproduce high-resolution sound in a frequency range from 5–40,000 hertz, achieving a sound quality usually only offered by master sound sources. Even when music is played from mobile devices, a sound quality is achieved that actually exceeds CD quality. With a weight of merely 216 grams, the headphones do not exert any pressure and can be worn over an extended period of time. Due to their neutral colouring, they match any outfit.