The reason I went back to one box because of the jitter I had heard in all dac's because of cables when I had a two piece system. I had used coaxial but the reports of jitter being present in all cable connections is something to explore. I hear none of whats been reported on my CD players. I know USB has been a big issue as well as timing errors in all cable connections while being reduced is still evident in most cable solutions. Could be that is what you are experiencing.