Hissing sound caused by PSU

[kashsoni]

I have 6 x zones using wiim pro plus via a NAD amp

I didn’t want to use up 6 x plug sockets so I found a 6 way USB C splitter power supply; ensuring it was adequately powered for all wiims.

I noticed I had a constant his on at least 4 zones. I swapped the phono cables and the issue persisted.

I then swapped the usb-c cable from the USB C splitter power supply for its own USB plug that came with with the WiiMs and the hissing appears to have stopped at first glance (only just swapped them)

Why would the usb splitter PSU cause a hiss?

 

[onlyoneme]

What did help to you, using a cable which came with the WiiM or a cable with the stock charger?

 

[jed1]

I would use 6 stock chargers instead of a USB-c charger with splitter. USB-c charger with splitter is unlikely to isolate loads and may cause interaction among WiiM's.

 

[kashsoni]

I always used the included usb-c cable.
I did not initially use the included PSU

after using the original PSU seems to be all good