The sound reproduction of this helmet is really breathtaking !!! When we know that the concept date + 25 years !!! You read and elsewhere, the 25th Anniversary Edition of PORTAPRO's brilliantly commemorates the birth of this helmet. To possess and consume WITHOUT MODERATION !!! Lightweight but strong, much longer you keep it on your ear that Monster Beat Dr Dre 300 euros which gives you + seem to have large protruding ears ... The Koss PORTAPRO has nothing to him envy. Attention to the quality of your recordings because these headphones faithfully reproduce all, even the worst ... So a good little player with a well-configured EQ, and Koss PORTAPRO take you so far that the people and places have a different image move even the most routine (home-job paths, hypermarket shopping ...) The Koss PORTAPRO: best anti Medoc grind !!!