Thanks. I also have a Theta Data III. The cabinet is quite susceptible to air induced vibration at mid bass frequencies. I have mine on a Zoethicus stand which sits on an oak plank base seperated from the floor by air bladders. On the stand the Data III currently sits on a lead shot tray and is mass loaded across the entire top (except the vents) with a thin bag of lead shot. I like the sound and by lightly touching the cabinet before and after it is quite clear that the cabinet vibrations are gone, However, I'm always looking for what might be a better alternative.
Isolation vs. Absorbtion
I am new to the audiophile hobby, and I am confused by what appears to be subjectivity and contradictions. When "mounting" a cd player and other components, is it best to use Soft Pads which ISOLATE vibration and RETAIN internal component vibration, OR is it best to use Hard Cones, which DRAIN (harmful) component vibrations into shelf material. Secondly, is it best to attach shelving to racks so that shelving makes Direct (hard) Contact - OR, should the shelving be Isolated from rack? Is there a scientific, indisputable answer?