I have both the old version and newer 'air' model, tried them on virtually every component. In general they have this tendency to provide the blacker background thing, problem is they tend to darken the sound unnaturally, some of the life sucked out. Certain freq affected, perhaps a bit of micro dynamics lost as well as some spaciousness in sound stage. I purchased many years ago, have continually experimented with them, haven't used them on a component in years, currently using one on breaker box door directly in front of dedicated audio system breakers, this mostly just to get use for one, can't really say if its having any effect. I will say if using on a component try spacing them slightly away from sitting directly on component, this mitigates the darkness somewhat such that I could imagine it could help in certain situations.
Shakti Stone
Does anyone have any experience with this?They claim it is noise reduction accessory.Seems like a low cost tweak for only $175.00.