I never use Pre from a DAC, even not that good one in MU2. So this is the DAC-only, you see it in the back of the device, no analogue ports. I've a personal, clear policy and strictly use separates Some may argue, it is my experience in certain quality levels you get more out of separates..
Thanks Gerald, we are happy to hear this! If you are around in the Munich show, stop by!
Since you like the Siren USB cable, if you have the chance, try to audition the Electra LAN cable, which can provide a very positive influence in the system.