The engineers at Polk Audio know great sound. They should, they've been building high-performance home and car speakers for demanding listeners for decades. Now they've taken that experience and expertise and created a headphone designed from the ground up to match the clarity and detail of their famous speakers. The Polk UltraFocus 8000 with active noise-canceling technology reproduces your music with audiophile-grade sound quality, while isolating you from the noisy environment around you. Enjoy a private concert in peace, without distractions from the outside world.