@grannyring -- simple: Ethernet (copper) coming from router ----> first opticalModule (powered by one SGC 5v linear power supply) ---> fiber cable ----> second opticalModule (powered by a second SGC lps) ----> Ethernet Cable (copper) ----> Innuos ZENith MK3 ethernet input.
The opticalModules replaced a pair of tPLinks FMCs I used to have before.
Improvement is audible. Mostly in timbre and tonality. Everything sounded more natural, and more focused.