For over 75 years, Sennheiser has been providing consistent, superior sound products to the audio industry. And now the German audio giant has taken it to the next level with the release of its latest headphones, the HD 660S2. Boasting an improved set of 300-ohm drivers, a lighter voice coil and a comfortable, ergonomic design, these headphones offer the ultimate audiophile experience for music lovers and sound connoisseurs.