I realize these forums are meant primarily for home audio, but i was wondering if someone could help me with my situation. I own a pair of Sennheiser HD580 headphones, and i use them for listening to music on my computer at home. Their powered by a headroom total bithead amp,but the extremely high impedance level of my phones doesn't allow this small amp to do them justice at all. Does anyone know of any amp/dac solutions that power these headphones the way they were meant to? Any feedback would be much appreciated.