[quote name='Rumble' timestamp='1317751109' post='1394176'] 
I think I know where you're coming from, but to avoid assumptions, why? 
[/quote] 
 If you're asking me about the Gramma Pad, then it's because it reduces the vibrations that can be enhanced by hollow stages/wooden floors. 
  
if you're asking JTUK, then I haven't a scooby