Hi Zoran,
There is a thread about Orea isolation footers, and some others. I can't remember what the title of the thread is. But to give an answer to your question, I do use three IsoAccoustics Orea Bronze footers under my D220. I haven't tried it without them since I received them, but I recall that once I put them under the amp, I decided fairly quickly to keep them, rather than sell or return them. The improvement was not dramatic, but noticeable. It seemed to add clarity, or a kind of fineness, to the sound. This is even with my equipment on a wall mounted shelf.
There is a thread about Orea isolation footers, and some others. I can't remember what the title of the thread is. But to give an answer to your question, I do use three IsoAccoustics Orea Bronze footers under my D220. I haven't tried it without them since I received them, but I recall that once I put them under the amp, I decided fairly quickly to keep them, rather than sell or return them. The improvement was not dramatic, but noticeable. It seemed to add clarity, or a kind of fineness, to the sound. This is even with my equipment on a wall mounted shelf.
Damon
Powernode, NAD M32, Cambridge CD transport, Analysis Plus, Nordost, iFi Nova, CSS Criton 1TDX, KEF C62
Vancouver, Canada