Was able to demo the game of tones preamp by master effects pedals which is based on the old tc electronics preamp made famous by meshuggah.

Worked great as a boost into my bogner uberschall twin jet. When the bass is cranked it goes into fuzz territory and when dialed down has more of a vintage marshall type of tone, strong upper mids with bite and a tight bottom.
I made a demo video if youre interested.