despite Macdadtexas laughter--power cords Do make a difference on pwr line conditioners--at least in my system they were significant and I have been through a number of cords --these are on furman IT ref 20 conditioner--call Scott at TEK line--pwr cords are outstanding and I have compared them with cords costing 3-4times their cost --good luck--also note system sensitivity and resolution will play a big part!