Just got the recently-announced Lumin U2 in for review. The U2 is solely a "streamer"; its function is to connect an upstream music server to a downstream DAC. One of the nice things about the U2 is that it has two very useful new features that the U2 Mini and U1 don't have: an SFP-type optical transceiver port to allow connection via LC/LC optical fiber directly into the U2 from an upstream server (no need for potentially grungy and dirty copper Ethernet connections-gack! ), and a new "dedicated" USB port that is exceptionally quiet and...direct-coupled. This port's function is soley to connect to a USB DAC, rather than USB devices e.g. hard drives, flash media, etc. Some pics: Rear panel You'll note the USB-A port at left that is specifically designed for audio; i.e., connecting to a downstream DAC. I'm told that this new DC-coupled USB port is quieter and cleaner than the S/PDIF, AES/EBU, and BNC connecting ports. The U2 also has dedicated chassis ground terminal so you can connect it to an Altaira. The one I have in review is black; here it is on top of my Lumin P1, which for this application is functioning as the DAC and preamp. I'm connecting to the U2 via LC/LC fiber from EtherREGEN in the remote server room, and the P1 with a USB cable. It's only got about 70 hours or so on it, and it needs 500 hours to fully burn-in, but so far, I am very impressed. It's sounding very good, indeed. More to come as I get more hours on it, stay tuned.