Can somebody clarify as to why the GT6-B with modelling switched off is perhaps three times louder than the ME50-B. I am guessing that the GT6-B has a Pre amp to drive the Model amps; however as I say the Amp Modelling is switched off, thereby only using it as an effects board. If its still going through a preamp is it neutral ? Does it colour the output in any way ? I have the same patches in other banks with amp modelling switched on which is an excellent feature if you need to use them without bending down to the pedal board.