When I was experiencing some “etched sound” when doing a long run of Ethernet direct to my streamer I tried Small Green Computers Fiber Media Converter (FMC) bundle found here. I also inquired the Audiogon community about Network Acoustics Eno Streaming System which can be found here. Due to my positive experience with the FMC bundle, I went further with an OpticalModule Deluxe with linear power supply (this is FMC) to a OpticalRendu with linear power supply (this is a streamer) which is offered by Small Green Computer. Essentially it looks like this:
TRENDnet Switch (above) > Pangea Premier Ethernet > Sonore opticalModule Deluxe w/ LPS & Finisar SFP 1324P2BTL > FS LC UPC to LC UPC OM1 (62.5/125) Multimode Fiber Optical Cable (15’) > Sonore opticalRendu & Finisar 1324 w/ Sonore LPS > Supra Excalibur USB 1 meter > TEAC NT-505
If I could do it over again, I’d love to try the Eno out of simplicity - I also like how it’s passive and doesn’t need an LPS.
I of course say all of the above, but who knows if your etched sound would be addressed by any of the suggestions provided. Too many variables within each of our systems. Food for thought nonetheless.