I tried to plug my BeyerDynamic T90 headphones into the Magnat MC1 ( "http://www.magnat.de/media/image/articles/datenblatt/f/MC_1.pdf" [Page 7]) and i got to hear quite some noise (went up with higher volume obviously). Any ideas what the problem might be - Mby the high output impedance ?  ...

As i dont really have a satisfying audio setup yet, im planning to get some high SQ headphones with a good yet affordable DAC.   So after some research i focused on the Sennheiser HD650 as headphones together with the dac DA300 from Denon.   However the HD650 aswell as any other headphone...