Adding a Phoenix USB?? How much will I notice??

If I may suggest: start by getting the additional power supply; it should be a significant improvement. On USB try the Singxer UIP-1 Pro first. Same idea as Phoenix but a tenth of the price. The Phoenix has two main functions: reclocking the USB stream and eliminating ground bourne and EMI/RFI noise. How much of that is needed and consequently how big an input it has depends much on the design of the FACs USB connection: results vary greatly from one to the other DAC.

I did find a difference with it in my system but only after some time. Initially, I wasn’t overwhelmed but then after a few days I disconnected it and it was clear that there was an obvious difference in transparency. It was like clearing out my ears. I certainly think it’s worth the cost but I’m sure it’ll depend on your system. Ideally, see if you can trial one at home but you do need to give it a bit of time to get used to it (and to get things settled). Then disconnect it and see if there’s a difference for you. Good luck in your journey!.