Network Switches

Apologies FOR not reading all of the responses (arguments).  A good network switch, placed before your streamer, IMHO, makes a considerable improvement in digital sound.  Those that refute this, IMHO, either have not heard it, can not hear it, or do not want to believe it.  As said, a $500 unit (I have had both Ether Regen and EE Bonn 8, makes a modest improvement.  A unit like the Network Acoustics Switch, the Telegartner (JCAT), or the GTT DeJitterit, makes a significant improvement.  I have tried all three and own both the GTT and the JCAT Gold.  Ignore naysayers if you want the best sound.  Buy a switch you can return to try.  NA makes this easy.  Also power supplies do really matter, and any good switch needs  a good LPS.  Additionally, the last network cable entering your steamer matters.  Try a good one, or even better, use a Network Acoustics Muon or Eno Ethernet filter between your switch and steamer, which includes a great streaming cable.  

Synergistic Research has one of the best Ethernet hubs and cables. Good independent reviews online. Can buy used around 2K. If you are streaming a lot and have a good system, it is well worth it.

“what is the effe - 01”
@rivinyl 

Both ENO and effe -01 offers 30 days money back guarantee. If we’re in your shoes, i would order both and compare them side by side. That’s the only way to know for sure that these devices offers any audible benefits in your system. 

I am quite impressed with the extent of responses my question has stimulated.  Drilling down a bit it looks like perhaps an optical power isolator may be the most cost efficient way to go.  Again, in my analogue brain it looks like the iFi Silent Power 2 is a similar device, in theory, to the effe isolator.  Any chance anyone has had a experience with both?

Also, a respected dealer/ friend who used to sell Network Acoustics products found them to compress dynamics in his system.  As much as he enjoyed working with them he ultimately stopped carrying their products.  Has anyone had a similar experience?

I have found that iFi is entry level at best. 

Save your money and dive in head first.

https://ediscreation.com/product/fiber-box/

https://www.smallgreencomputer.com/products/opticalmodule-deluxe?srsltid=AfmBOooFdG7Drah6ma1yWmE55zfivqY42v8VggMrL6RXaAmPmROXKK8K