I like this thread, because, some of us hear differences when tweaking, and some bash it as snake oil. I am on the side, that every tweak I have done, to my systems, and others ( and it has been a lot in over 45 years ), has made a sonic difference. Some differences were small, some were huge, some for the better, some for the worse. But, always, audible. This is going back as far as, carefully applying mortite, to the underside of a turntable platter. Later, applying green paint to the inner and outer edges of cds, and, of course, footers and weights, of all sorts, under, and, on top of, equipment/speakers. The list is endless. The science is less meaningful to me. It is all part of being an audiophile ( and videophile ), because, to the end, we all want to extract more information from our recordings. MrD.