I've been using these headphones for 9 years, powered by an AMB m3. I've owned a lot of headphones over the years but these put an end to my GAS, my only moment of weakness was buying some Beyerdynamic T5's but they were quickly returned. My music taste is mainly acoustic music with some pop and rock mixed in and I'm yet to find something that beats these, especially for piano/female vocals. With this kind of music, the W5000's are simply magical.