Final Audio Design D8000 AFDS Planar Magnetic Driver Metal HeadphonesFinal Audio Design reinvented the planar magnetic model driver with AFDS (Air Film Damping System). With the development of the new AFDS, Final has achieved sound quality that has both the sensitive high ranges of planar magnetic models and the volume and open feel bass tones of dynamic models. This is a product that will have you making new discoveries from music you're used to listening to and will have you wanting to listen to your favorite music