Anyone using a LAN isolator?

@rsf507 

From Ebay US$225.

There have been faint murmurs of copies, but there seems less chatter on this product.

Where do I place my LAN Isolator?

Options are:

Between ethernet wall socket and modded network switch

Or from network switch to streamer.

@jerrybj 

Try both options and see if you can decipher one position over another yields better sound improvement. My recommendation would be to plug the LAN pig tail into streamer and the LAN cable from network switch into ‘isolator’ box. 

in principle, the lan isolation is best and most critically applied at the ethernet inlet to the audio streamer where the signal is created to be sent to the dac/renderer -- sometimes the streamer and dac coupled in the same unit...

That's what I thought would make more sense, from switch to streamer.