Samuel, I suspect that most any manufacturer could or would claim that their cable risers were developed "from sound theory." I guess sound here has two meanings-well based and sounding good. I assume you mean the former. If so, what is that theory?
About five years ago, I made or bought some 25 different types of risers. I folded cardboard into triangular shape with notches for the cables. I had chopsticks with twistems around their centers. I had glass blocks and glass isolators found behind at power substation as well as ceramic ones also found there. I had ceramic tiles with two angled together and held into position on a wooden base. I made sting supporter and monofilm supporters with wood supports. I made risers out of maple, walnut, pine, oak, and even some with ebony tops. I tried china cups, earthenware bowls, stemmed glasses. I got tall risers made of the material that chips are or were shipped in. I bought ceramic entirely dark brown Suspenders from Rightway Audio shaped like electrical isolators and from a surplus isolator site in Iowa defective 18K volt 15" tall isolators with lead bases. I don't think I tried jewel boxes, but I did have plastic cups and paper cups. I use one gallon milk bottles with their top cut off. I am probably forgetting some of my attempts. All of these were, of course, without any "sound theory," just shots in the dark.
Everyone of these help over having the cables on the ground, but one stood out, the Rightway Audio Suspenders. I think they are out of business now and I have never tried the present company making such ceramic isolators product.
I must say that I bought Combac speaker wire wooden supports at a later date, which were nice under my speaker wires,but they had to be on top my Suspenders. I do not see these feet on the Combac page now.
I will just turn further experimentation over to younger audiophiles and enjoy my Suspenders.
