Planar Drivers: Not your typical headphone driver! A planar magnetic driver is a flat membrane that is surrounded by magnets. When current is delivered, the membrane produces sound that has lower distortion, better bass, and pinpoint imaging that is usually not found in your typical headphone driver. The size of the driver in the Monolith M1060 is 106mm. Open Back Design: Instead of an 'inside your head' isolated experience that traditional closed-back headphones provide, open-back headphones provide a holographic listening experience. It's as if you're in the middle of a live performance, instead of being closed off from the world.