Sennheiser HD 25 Light Headphones (508664) Acclaimed for their ability to handle high sound pressure levels and excellent sound reproduction the HD 25s are often found in DJ booths on stage and in studios around the world. For more than 30 years. The Sennheiser HD 25 Light delievers the pure sound while maintaining a minimalistic design. The HD 25 Light are closed dynamic headphones for monitoring recording and outdoor applications. Featuring a minimalistic headband the HD 25 Light are an attractive and lower-cost alternative to the HD 25 while keeping the suitability for DJ use.