Due to the postage costs sending to Korea, it was much cheaper for SoTM to buy the same model locally. I even asked them to buy the appropriate fiber cable so they could test everything (because they didn’t have any fiber cable themselves at the time). So they bought everything, modified the FMC’s and tested everything properly before shipping the tested FMC’s + fiber cable to me.
They gave me the costs all upfront and I paid upfront.
I think I was the first to ask them to mod FMC’s and they’ve done a few since. But SoTM have been doing mods of all sorts of things for people for many years, so that’s where I got the idea to ask them.
Btw: Uptone Audio will have their EtherRegen coming. It will feature a fiber port…
If you could find a compatible fiber switch, then you could just use a single Uptone EtherRegen for the DAC side, using it’s single fiber port. If the optical-to-copper conversion process is indeed noisy (I don’t know) then having the EtherRegen on the DAC/streamer side connection will probably be much lower noise than even my modded SoTM’s (knowing the work of John Swenson).
Or if money were no object- get a pair of these, connect each via their fiber port, just like a pair of FMC’s. From what I read though they are hinting the copper isolation will be very effective alone - moreso than typical transformers in ethernet cables/ports. They are using different magnetics/transformers. Read more below:
Having said that, I’m very happy with my modded TP-Link FMC’s.