That is understood. I'm only surprised, that you decided to use the SPMS, only after you spend considerable amout of money on the linear PSU for the board.
As you know, the problem with the SMPSs is two fold - they inject the noise to the component they power and then back to the AC line, where it can affect other components.
The display, which noisy by itself, probably does not care about the extra noise coming from the SMPS, but other components may not be very happy seeing the extra noise on AC line.
As you probably know, Aurender went even further in their W20 server, where they implemented a battery PSU to drive the audio/usb part. The problem is, that the MoBo and the charger are still beeing powered by SMPS.
As Martin Colloms from HiFi Critic had discovered, simply plugging the Aurender W-20 into the same AC line as the rest of the system, makes the system sound worse. He speculated it is because of the noise from the SMPS. No wonder HiFi Critic review is the one missing from the Aurender website ...
It is also no surprise, that the new Aurenders all use all-linear PSU. No SMPS in sight (and for the S10 and X100 models, aftermarket linear PSUs are already offered).
