I also have dedicated lines and use a Shunyata RZ1(?) receptacle on one and a Hubble hospital grade on the other.
On a whim I replaced the single plug(not duplex) Hubble with an old FIM, blue duplex.
What a difference.
More of all the good stuff.
I always knew better receptacles made a difference, but I was not prepared for as much of an improvement the FIM duplex made.
There was nothing wrong with the single Hubble receptacle, it was tight fitting, but the FIM duplex just added more depth and front to back image and seemed more like a component or wire upgrade.
I suggest trying several different receptacles,until you find the one that does more than the others.
On a whim I replaced the single plug(not duplex) Hubble with an old FIM, blue duplex.
What a difference.
More of all the good stuff.
I always knew better receptacles made a difference, but I was not prepared for as much of an improvement the FIM duplex made.
There was nothing wrong with the single Hubble receptacle, it was tight fitting, but the FIM duplex just added more depth and front to back image and seemed more like a component or wire upgrade.
I suggest trying several different receptacles,until you find the one that does more than the others.