Well, this thread prompted me to try a bit of experimentation. I bought a bit of good quality mahogany and mpingo (african backwood) 1"x1" stock. My reasoning being that these woods are about as sonically dissimilar as any pairing. Mahogany is mellow & woody, Mpingo is so dense it sounds almost like a ceramic when you click two blocks together. I cut several sets of blocks in the small size, golden ratio size Cardas offers. When these are inserted under my cd transport & dac, they most obviously shift the tonal emphasis of the sound, more so than I expected. Mpingo, used exclusively, imparts a definite treble emphasis. I'd say that I like the transport sans blocks, on it's own feet but supported by a thick maple platform. A mixture of two mahogany blocks & one mpingo block under the dac does sound a little bit better that stock footers. Skeptics may scoff, but there is a definite tuning effect possible with wood footers.
