One thing to consider is that CAT 3, 5, 6, 6E's are twisted to offset interference. If you look at the NEC, page 710 of the PDF (below) spells it out. The part 2, on that page says you need 2" separation. but this is for non-power over ethernet.

https://ia600805.us.archive.org/20/items/gov.law.nfpa.nec.2011/nfpa.nec.2011.pdf

hsb


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Denon 4520, EPIC80/500/VP180 Speakers