Yamaha DTXpress/DTXplorer/DTXtreme

Actually, you can simulate the 'balanced' connection, with a little 
soldering.
A regular shielded cable, like guitar, or the crappy ones that ship 
with DTX, is one insulated cunductor on the + side, and a ground braid 
for the '-' side.The ground is part of the circuit.
Instead, use a cable with TWO conductors, PLUS a ground braid. This 
could be a typical TRS (Stereo) cable.BUT.... you have to use MONO 
plugs. Use the two insulated wires for the conductors. Now solder the 
ground braid IN ONLY ONE PLUG to the SLEEVE terminal. The other end 
of the braid is not connected. This energizes the ground braid-- thus 
sheilding the signal--without it actually transporting the signal.
If this is not clear, maybe I can post a diagram.
Scott