GT-6, GT-8: Turning Off the Preamp Section
It is possible to turn off the Preamp section in any patch. Use the following steps to do so:
1. Choose a patch to edit.
2. Press the PREAMP button (the upper left button, next to "TYPE VARIATION) so that it is flashing. "Preamp/SP Off" will also be flashing in the display.
The Preamp is now off and by-passed. If you want to save the new setting, press WRITE twice to save it to the patch.