Back when Perfect Path technologies was selling their graphene Contact enhancer, the inventor was touting the feature where imperfections in Interconnect and speaker connections was filled in by the graphene reducing micro arcing related noise.
My experience was a reduction in noise floor and "cleaner" sound.
More to it than conductivity, also supposed to shield RF and EMF
from the interface. I’M a believer (no offense Monkees fans ;-)

