Planar Drivers: Not your typical headphone driver! A planar magnetic driver is a flat membrane that is surrounded by magnets. 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. Comfort: The Monolith M1060 has been engineered to be comfortable for extended listening sessions. Large, comfy earpads are designed to keep you comfortable as you listen. Quality at a Fair Price: Monoprice's rugged design and rigid quality control standards deliver high quality products at fair prices. Impedance: 50 ohms International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.