Triode User
Member of the Trade: WAVE High Fidelity
I have 3 of the original Ceraball feet under my Dave and Blu2. They are raised up 30 mm. It is a very worthwhile upgrade, not only for sound quality but mainly it keeps them much cooler. Even during the very hot summer, the Blu2 just got slightly warm. There is not much difference in its temperature when it is in standby and when it is operating. Unfortunately the original Ceraball feet are no longer available. I can recommend Ansuz resonance control, but they are expensive.
I use rubber door stops . . . . (sorry about the poor photo)