Yamaha DTXpress/DTXplorer/DTXtreme

ED SED: "Other people have dampened cymbals, say, at the top of the 
stand or even filled their rack tubes with insulation material (OGD, 
was that you?)." 

Twas I.
Rack tubes and cymbal stands are filled with expanding insulation 
foam. However, you could use regular foam, cotton balls, toilet 
paper; anything that would lessen the vibrations.

I've not had much problem with crosstalk and all my minvels are set 
pretty low. 

Stephen