Have you ever visited David Magnan's website (the cable maker) and read any of his recommended tweaks? http://www.magnan.com/powerline.html
On the page I've linked to talks about placing three Enacom AC filters on the same circuit as your stereo. The filters are working in parallel, all of the recepticles on the same circuit receive the benefits of the filters.
Replacing all of the recepticles also have the effect of making that circuit better. It does so by fixing the weak links, replacing the stock $.39-$1.69 that are made of who knows what quality of metals.
As the AC flows around the room through each recepticle, think of a stream flowing along smoothly until it hits a big rock (the cheap stock recepticle), the rock restricts and alters the flow of water. Then it hits the second big rock which does the same to the flow, then then third rock.
These breaks in the smooth flow of AC current by the cheap recepticles degrades the AC in your good audiophile recepticle, most of us don't realize it until someone tells us or we find it on our own by accident or experimenting.
My particular recepticles, the Afterburner 8, is a very neutral and quiet recepticle, which makes it very detailed. By adding the other three, my noise floor dropped a good deal more so I'm hearing even more minute details.
One thing to consider when doing this is that if someone likes a colored recepticle like one in the Oyaide group, multiple recepticles adding color may increase the coloring to a point that they don't like the effect.
It may be a good idea to have a starting point using a Porter Port. It's only $36.00 and it's neutral, but it is also a very good quality recepticle that will easily remove the weak links caused by the stock recepticles.
From there, anyone can proceed introducing more colored (or flavored) recepticles one at a time to see if they like the results.
I've posted this because I still can't get over how much these three added but unused recepticles have cleaned up my AC signal. I never would have thought something like this would do so much.