@elmoe What I am saying is make the difference between the unit (yours) and the model (all units). Has anyone else reported USB connection failure like this? I have not seen it in the past 80 pages here. So it is safe to assume that this is an isolated incident. Remember that RME does not manufacture all components from scratch. One of the widgets from a supplier might have malfunctioned. If your unit worked fine for two months, how would their QC have caught it? And since this has not been reported by others, it does seem that they use quality parts/suppliers, but nothing is 100% all the time. What I am saying is - if you liked the RME ADI-2 DAC, keep the replacement if that's what it comes down to. Don't overreact and conclude that will fail too. Mine has been running flawlessly since December.