Planar Drivers: Accurate Sound. Low Distortion. The Monolith M1570 uses a newly developed 106mm planar driver with a dual linear symmetry magnet array to deliver exceptional sound quality. Open back design. An airy, spacious soundstage. Each earcup features a grille, which allows air to pass through to the planar driver. Gorgeous comfort. Beautiful aesthetics. Padded headband. Removable earpads. Removable earpads: The supplied earpads are easily removed, allowing you to upgrade to your earpad style of choice. Each M1070 comes with a pair of memory foam lambskin earpads and a pair of memory foam velour earpads.