Using premium drivers with CPF (Composite Performance Film), the EAH-F50B headphones provide class-leading bass. Use the cable connection and the bass drops right down to 4 Hz - a difference you can feelFor the maximum in detail and realism, Hi-Res music files take your listening pleasure to the next level. Plug in the supplied cable and these Technics headphones become Hi-Res compatibleWith a frequency response of 4-40,000 kHz, these headphones cover an expansive range From the deepest rumbling of sub-bass to subtle harmonics that affect the way we hear top-end notes, the Technics has it coveredWith Bluetooth connectivity you get to enjoy wireless freedom with a range of up to 10 m from your music source, it means you can leave your player in a bag, pocket or even at the other end of the room - giving you the freedom to move aroundThanks to LDAC wireless audio, these headphones are able to receive around three times more detail than ordinary Bluetooth headphones With an improved frequency response, you\'ll hear more of the music, with a sound that\'s closer to Hi-Res audio