I listen to both CD (wife's mandate)and a NAS based flac files. I placed EA Pace Car between both my traditional transport and SB3. Pace car connects to my Northstar 192 DAC via I2S connection. Pacecar definitely cleans up a CD or or music files from a server. I definitely notice more resolution as I can start to locate individual instruments in a large band or orchestra. I wouldn't say the sound stage got wider -- I would say I hear more depth as I can recognize more layers from front to back. I guess some people would call this holographic. Anyway, EA Pacecar does that for you. My SB3 is only modded to "communicate" to my Pacecar and is stock otherwise. I even have the stock wallwart. I just doesn't matter what comes out of the "transport" as long as all the bits are there. Pace car will reclock and feed your DAC with synchronized file.