I have been listening to this headphones for a couple of weeks now. They are great. I compared to the 800s of a friend. He paid twice that much for essentially the same headphones. The German built quality is in the looks and the feeling of this product. The sound is excellent. I paired it with several amps, including a Mytek Liberty, a McIntosh C47 and a cheap IFI Zen DAC. Great sound with all of them.