Please check the reviews of the Muon Pro and talk to the Alpha guys about it. In the end of the Hans B video that i linked to he talks about how they tested this together (him and Alpha Audio) and concluded how amazing it is. I am not saying that it can´t be bettered but it does a lot for being a passive filter only, and is proven really hard to better.
Also, think about the new PS Audio Airlens, that apparently is really good. What is Airlens? It is just a gap of air, just like a wifi extender, to break the physical connection. At least that is how i understand it.
