Since not mentioned above I use Inakustik Referenz Ethernet loom.
Handmade in Germany.
(Inakustik Micro Air interconnects)
I can detect nothing added to the signal path.
LTA Preamp/Bryston Amp/Magnapan LRS+/REL Sub.
I order cables out of England as 50% less than US.
Ridiculous.
Excellent cables.