Brand new magnesium cone – Focal Speaker Drivers Clear Mg Professional incorporates 1 5/8″ (40mm) full-range speaker drivers with magnesium ‘M’-shaped inverted domes. Thanks to this brand new cone, combined with the frameless 1″ (25mm)-diameter and 1/4″ (5.5mm)-high copper voice coil, the sound experience is made extremely precise, delivering impressive detail across the full spectrum while preserving excellent tonal balance. Fast and dynamic – The Ultimate Work Tool The flexibility of the surround offers lightness, therefore more dynamics and impact, particularly in the bass. The open grille inside the earcup closely follows the ‘M’ profile of the cone to further reduce adverse effects. With a 24kHz break-up, the high frequencies are extremely linear and the transient signals are respected. The headphones disappear to the benefit of the audio signal, with its uncompromising and even faster transfer quality.