I had thought of upgrading my Audio Alchemy DDP-1 + PS 5 (DAC/PRE). Fortunately, I came across an AGon thread mentioning Ali-Express Nordost knock off cables. I decided to stick my toe in the water and bought a Odin 2 coax cable and was shocked how much better my system sounded then my Pangea Premier XL. I then bought a Odin 2 PC and XLR interconnects, more jaw drops, then I bought the cheaper Nordost PC (<$60!) for my PS 5 outboard power supply and my Audiolab CDT6000> speaker cables. Ditto: crazy improvements for very little investment. One component left was my Core Power 1800 PLC. For it I bought the Nordost Gold PC (<$100!). When it arrived I was torn between putting on my transport or the PLC. Fortunately, I decided on the PLC as I was familiar with the systems overall sound. Could it make a difference over my 15 year old heavy gauge, stiff boutique PC, and if so how much? Oh my, but on a micro-level like cleaning a window, which revealed deeper, wider, taller stage improving focus of tiny sounds deeper into the sound stage, AND, bass.
So for way less than the price of my very well know speaker and interconnects, I realized my DAC is just fine. FYI all come with FREE returns. You just have to be patient as it take ~ 3 weeks to arrive
hth