I found a set of cones at a second-hand audio store a while ago. Three of them in a plastic bag; I don't know the brand. I tried them and I really did not notice a difference.
Personally, I prefer to isolate my tube preamps from inco ing vibrations as opposed to coupling them to the floor with cones/points, which I do not believe, despite propaganda to the contrary, isolate anything by themselves. FWIW my amps are SF SFM 160's.
Yes, it's worth experimenting with cones. The results can very by product but the potential for improvement is significant Particularly good cones can be found at the Mapleshade web site.
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