So after stuffing the completed dac into a quick wood box I made for it, I powered it up and used it to feed my headphone amp. Wow, lots of detail, wonderful sound, all in all a great dac (aside from a little high pitched whine that I need to figure out where it's coming from). I then switched my amp to speaker preamp mode....and I was amazed at how clear and wide the soundstage was! I could clearly tell where the instruments were and where the singers were positioned. It was incredible, and now I can't stop listening! Great job Russ and Brian, this one's definitely a keeper