Totally untrue our Audioclub did a 5 hour demo showing judges from the modem-Router combo, an absolute good quality Linear Power Supply makes a nice improvement, like the excellent Linear Tube Audio LPS it’s superb build and sonics and comes with a great 12v DC cable ,most router combos are 12v just look on the bottom , and take around 4 amps this LPS goes up to 8 amps ,
fromthereyou need a good Ethernet hub theSW8 that I have is a great buy $599
telema LPS low noise regulators and a ocxo over controlled clock
both items needs a decent power cord thepangea Sig mk2 awg14 is perfect only $200 each , and forsure you need at bare minimum$200 or more -2 Ethernet cables Wireworld starlight a good starting point ,as well as their usb cable , then
your streamer will sound much better ,a node is cheap $$150 in parts including the packaging ,my point is to get digital to sound good you have to remove all these weak links ,a better fuse,and power cord like the Pangea a must and at least a decent line conditioner, a dedicated 20 amp line bettter still.
we removed one piece at a time and left the room each increase improved the lower noise floor imaging as well as sound staging ,
just like a good turntable you have to address Everything starting at the router
the pathetic $5;wall wart power supplies are pure noise ,and digital noise does travel home to home thsts why its essential to isolate this with a good LPS from the start. I am still working on upgrading cables , Jcat Reference make Excellent usb cables as well as Ethernet cables yes $1k+ each but well worth it ,
being an Audiophile it’s a constant to upgrade as $$ monies allow .