Rocktron Metal Planet Distortion - Manual (Page 11)

Hints and Tips
Distortion always sounds best when put at the beginning of your signal
chain. Thus, when using other stomp boxes, put your Metal Planet first
then followed by your other stomp boxes.
However, if using a wah wah, the typical setup is to put the wah wah
before the distortion.
If using a noise reduction pedal such as the HUSH pedal you should put it
at the end of your stomp box signal chain.
Experiment with the controls of the Metal Planet - the mid-frequency
sweep will provide a huge variety of tonal variations.