Thank you for your suggestion.
The only reason why I plugged in the stompbox was to test the behaviour of a percussionsound similar to the sound of my transducer pickup. It was just something like an experiment on the behaviour of the input. In another context I had some problems with clippings in clean sound playing muted percussive sounds on a tele.
But to shorten it: I know how to get the sound that I wish from my other equipment. I just wanted to hear from the forum if I did something wrong in the settings.
Everythings fine. Thanks to everbody, who gave a constructive advise!