What is the Delos butcher block sitting on? How stable is the stand it sits on?
I have a ClearAudio Innovation Compact with Universal arm. It sits on a VPI turntable stand filled with sand. On top of that is a butcher block that sits on cones. My turntable sits on the butcher block with no special footers. My setup is dead silent. No rumble or noise if you walk by the stand.
The Innovation turntables have magnetic bearing that should isolate the platter. Where is this rumble coming from, the motor? There could also be some type of problem with the setup.