I took two amp models Fend Twin and a 68 plexi turned off the effects , using a looper I recorded a minutes worth of playing , ran the loop through each amp separately A/B. the difference was as expected markedly different as expected. in the signal chain going to the modeling amp I inserted a MojoMojo pedal set down low to introduce some edge just a little overdrive. I've heard the two amp models clean and each with the mojomojo. now I know how a mild dose from the dirt pedal effects the sound of the amps. The dirt box is a keeper. Using the looper really was helpful in that I could hear the guitar and not have to be tweaking and listening at the same time. The doubts about the modeler hanging in the back of the head bone were dispelled I'll listen again tomorrow and see about that cool tone after some rest and distance.