PSU Upgrades. Why?
There are power supply 'upgrades' for many Hi-Fi components, from turntables to phono stages and amplifiers and pre-amps and so on. Some from the manufacturer or others being aftermarket units.
If these 'better' power supplies are needed, that implies that the original was inadequate. If that is the case, why are so many products being sold with unsuitable power supplies? Or, is the wool being pulled over our eyes?
It is impossible for anything digital to sound analogue, because it isn't analogue!