...if you route the output correctly (depending on what is assinged to what output), yes, they will still come through the internal speakers - however, you will notice that some sounds will be PANNED either to the RHS or LHS.

To route separate outputs:
* UTILITIES
* PAGE 2
* Keyboard out assign (F6)
* Separate 1 2 3 4 (F4)
CURSOR to move to instument to re-route
-VALUE+ to assign
EXIT
SAVE/ENTER (if you want to leave this setting whenever you turn on X-unit)

AJ.