Mac mini Core 2 Duo OSX Lion w/ external LPS, Bit Perfect > 30' Corning Optical USB > iFi Gemini > Musical Paradise Battery USB power > Wyred Dac2 DSD > Rogue Metis Tung Sol VT99 SE > Wyred sx500 mono's > New England Audio Resource 50me (mk I) w/ Microscan TM-8 dampers. cabling - Harmonic Technology / mains filtration - Blue Circle Audio. Alternately... Wyred Dac2 DSD direct > Pass Aleph 3 > New England Audio Resource 50 me cabling - Nordost Blue Heaven