Closed-back headphones have a solid back that covers the ear, while open-back headphones have an open back that allows sound to escape. Closed-back headphones tend to be better at blocking out external noise, making them ideal for use in noisy environments. They also tend to have a more focused sound, making them great for listening to music or gaming. Open-back headphones, on the other hand, provide a more open and spacious soundscape. This makes them great for listening to classical music or watching movies. However, they don’t block out external noise as well as audiophile closed back headphones, so they may not be the best choice for use in a noisy environment.